AI 插图助力教育工作者：打造引人入胜的教学材料

Educational concept visualization for DNA replication, 16:9 landscape format suitable
for lecture slides, designed for undergraduate biology students. Modern educational
illustration style with clear, vibrant colors and simple shapes.

Center the double helix DNA structure opening at replication fork, with two strands
clearly labeled "Leading Strand (3'→5')" and "Lagging Strand (5'→3')" in blue and
purple respectively. Show DNA polymerase enzyme as simplified teal protein complex
labeled "DNA Polymerase III" adding nucleotides continuously on leading strand.

On lagging strand, illustrate discontinuous synthesis with 3-4 Okazaki fragments
shown as separate segments labeled "Okazaki Fragments (~200 bp)", each with its own
RNA primer shown as red segment labeled "RNA Primer". Include DNA ligase enzyme in
yellow connecting fragments, labeled "DNA Ligase (sealing)".

Add helicase enzyme at fork labeled "Helicase (unwinding)" in orange, with small
arrows showing unwinding direction. Include primase enzyme creating RNA primers
labeled "Primase (primer synthesis)" in green.

Use soft gradient backgrounds (light blue to white), clear sans-serif labels in dark
text, simple geometric shapes for enzymes, arrows indicating directionality, clean
educational textbook style similar to Campbell Biology or Molecular Biology of the
Cell. High contrast for visibility on projectors, no cluttered details.

Step-by-step illustration for titration procedure in analytical chemistry, 4:3 landscape
format for laboratory manual, designed for high school chemistry students. Clean,
educational illustration style with bright, clear colors and simple 3D-style lab
equipment.

Horizontal sequence with 5 numbered steps, left-to-right progression connected by blue
arrows:

Step 1: "1. Initial Setup" - Burette clamped on stand filled with purple standardized
acid solution labeled "0.10 M HCl", volumetric flask below containing clear solution
labeled "Unknown Base", white magnetic stirrer underneath labeled "Stir Plate".

Step 2: "2. Add Indicator" - Dropper adding 2-3 drops of phenolphthalein into flask,
solution now faint pink labeled "Phenolphthalein Indicator", volume marking "25.0 mL"
visible on flask.

Step 3: "3. Begin Titration" - Hand turning burette stopcock, acid dripping into
swirling flask shown with motion arrows, burette reading "0.00 mL" clearly marked,
solution still pink.

Step 4: "4. Approach Endpoint" - Burette now showing "23.50 mL" dispensed, solution
in flask showing mixed regions of pink and clear with label "Color Fading", increased
attention indication "Add dropwise".

Step 5: "5. Endpoint Reached" - Solution completely clear labeled "Endpoint: Colorless",
final burette reading "24.35 mL" circled in red, calculation shown "Volume Used =
24.35 mL", checkmark indicating completion.

Use consistent equipment proportions, soft shadows for depth, safety goggles visible
in hands when present, caution note "Wear PPE" with small safety icon, modern chemistry
textbook aesthetic, high contrast labels in Arial font, suitable for both color and
grayscale printing.

Comparative educational diagram showing plant and animal cell structures, 16:9 landscape
format for high school biology textbook, side-by-side comparison layout with clear
vertical divider.

Left panel labeled "Plant Cell" showing large rectangular cell with thick green cell
wall labeled "Cell Wall (cellulose)", large central vacuole labeled "Central Vacuole
(water storage, 90% cell volume)", multiple green chloroplasts labeled "Chloroplasts
(photosynthesis)", small Golgi apparatus labeled "Golgi Apparatus", nucleus labeled
"Nucleus (DNA)", endoplasmic reticulum labeled "Endoplasmic Reticulum", mitochondria
labeled "Mitochondria (fewer)", rigid rectangular cell membrane inside cell wall.

Right panel labeled "Animal Cell" showing irregular rounded cell with flexible pink
cell membrane labeled "Cell Membrane (no cell wall)", NO central vacuole but several
small vacuoles labeled "Small Vacuoles", NO chloroplasts (absence noted), prominent
Golgi apparatus labeled "Golgi Apparatus (larger)", nucleus labeled "Nucleus (DNA)",
endoplasmic reticulum labeled "Endoplasmic Reticulum", numerous mitochondria labeled
"Mitochondria (more numerous)", flexible round cell shape.

Center vertical divider line with "vs." label, difference callouts with colored arrows:
green arrow pointing to cell wall "Present in Plants Only", yellow arrow pointing to
chloroplasts "Photosynthesis Capability", blue arrow pointing to vacuole size "Size
Difference", red arrow pointing to shape "Rigid vs. Flexible Shape".

Use matching color schemes (green/purple organelles on both sides), identical label
font sizes, same magnification level, modern educational illustration style, soft
3D appearance with subtle shading, clean white background, summary text box at bottom
"Key Differences: Structure, Energy Production, Shape", suitable for textbook printing
and digital display.

Interactive textbook illustration explaining photosynthesis for middle school science
textbook (ages 11-13), 4:3 landscape format, engaging but scientifically accurate
educational style with diverse student representation.

Center showing cross-section of a leaf with clearly visible cell layers: upper epidermis
(protective layer), palisade mesophyll cells (tall rectangular cells packed with bright
green chloroplasts labeled "Chloroplasts"), spongy mesophyll (irregular cells with air
spaces), lower epidermis with stomata (small openings labeled "Stomata" with guard cells).

Left side input arrows showing: bright yellow sun rays labeled "Sunlight (Energy)",
blue water molecules from roots labeled "H₂O (Water)" with upward arrows through xylem,
gray CO₂ molecules entering through stomata labeled "CO₂ (Carbon Dioxide)".

Inside chloroplast detail bubble showing: light reactions (lightning bolt symbol with
"Light Reactions → ATP + NADPH"), Calvin cycle (circular arrow diagram labeled "Calvin
Cycle → Glucose C₆H₁₂O₆"), thylakoid stacks visible.

Right side output arrows showing: green glucose molecule labeled "C₆H₁₂O₆ (Glucose -
Food)", orange oxygen molecules exiting stomata labeled "O₂ (Oxygen)".

Include diverse group of three students (one Hispanic girl, one Black boy, one Asian
student in wheelchair) in bottom right corner examining a potted plant together,
magnifying glass in hand, representing observation and learning.

Use warm, inviting colors (green, yellow, blue, orange), clear sans-serif labels with
chemical formulas, friendly but scientifically accurate illustration style similar to
modern McGraw-Hill or Pearson middle school textbooks, high contrast for readability,
equation summary box "6CO₂ + 6H₂O + Light → C₆H₁₂O₆ + 6O₂" in corner.

Biology assessment visual for cell organelle identification quiz, 1:1 square format
suitable for online learning management system, designed for high school biology final
exam (ages 16-17), testing application-level understanding.

Show cross-section of an animal cell with 8 clearly visible but unlabeled organelles
numbered 1-8 with small circles containing numbers, moderate detail level (not overly
simplified, but not electron microscope complexity).

Structure 1: Nucleus - large central spherical structure with visible nuclear envelope
and darker nucleolus inside, prominent but do NOT label.

Structure 2: Mitochondria - 2-3 oval organelles with distinctive folded inner membrane
cristae visible, scattered in cytoplasm.

Structure 3: Rough Endoplasmic Reticulum - network of folded membranes studded with
small ribosomes (tiny dots), near nucleus.

Structure 4: Golgi Apparatus - stack of flattened membrane sacs with vesicles budding
off, distinctive curved shape.

Structure 5: Lysosome - small spherical vesicle with slightly granular interior, single
membrane.

Structure 6: Cell Membrane - outer boundary of cell, thin double layer, semi-permeable
appearance.

Structure 7: Smooth Endoplasmic Reticulum - tubular network without ribosomes,
continuous with rough ER.

Structure 8: Cytoplasm - background fluid filling cell, slight texture.

Use scientifically accurate colors and proportions: purple/pink nucleus, green
mitochondria, blue ER, yellow Golgi, red lysosomes, neutral cytoplasm. Clean educational
style with sufficient detail for identification but avoid making any structure too
obvious. Professional biology exam aesthetic, clear numbered callout circles (white
numbers on black circles), no text labels on structures themselves, suitable for
multiple-choice question format.

Question stem (for context, not in image): "Identify the organelle responsible for
cellular respiration and ATP production. A) Structure 1, B) Structure 2, C) Structure 4,
D) Structure 5" [Correct answer: B - Structure 2, mitochondria]