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SIX KINDS OF BENEFICIAL INSECTS COLLECTION 16.3*7.7*2

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SIX SPECIES OF INSECT PESTS COLLECTION 16.3*7.7*2

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FROG DEVELOPMENT

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LIFE CYCLE OF CABBAGE BUTTERFLY

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FLOWER SYSTEMS

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RICE GERMINATION

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CORN GERMINATION

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WHEAT GERMINATION

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PEANUT GERMINATION

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