單字卡學習系統
| 類別 Vocabulary
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Marine animals live in the deep ocean.
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The marine environment is very fragile.
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A forest ecosystem contains many species.
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Pollution threatens the balance of the ecosystem.
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The captain stood on the flying bridge.
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From the flying bridge, you can see the entire deck.
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Chlorophyll gives plants their green color.
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Plants use chlorophyll to absorb sunlight.
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He studied nautical charts before sailing.
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The museum displays nautical instruments.