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| NOUN |
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| /ʃel/ |
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| 1 | C/U the hard outer part that protects the body of a sea creature （海洋动物的）硬壳 |
| a crab shell 螃蟹壳 |
| The kids were collecting shells on the beach. 孩子们在海滩上拾贝壳。 |
| | 1a | C/U the hard outer part that protects the body of other animals, for example snails and tortoises （蜗牛、乌龟等的）壳 | |
| | 1b | C/U the hard outer part of an egg or nut （蛋或坚果的）壳 | | pieces of egg shell 碎蛋壳 | |
| | 1c | C the outer parts of something such as a car or plane （汽车或飞机等的）外壳 | |
| | 1d | C the outer walls of a building that remain after a fire or an explosion （建筑物在大火或爆炸后剩下的）骨架 | |
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| 2 | C a weapon consisting of a metal container filled with a substance that explodes, fired from a large gun 炮弹 |
| anti-aircraft shells 防空炮弹 |
| PHRASES |
| - | come out of your shell
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| to stop being shy and begin to confidently show your real character and feelings |
| 不再羞怯；活跃起来；不再缩手缩脚 |
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| Stephen needs someone who can bring him out of his shell. 斯蒂芬需要一位能使他放开手脚的人。 |
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| - | withdraw/retreat into your shell1
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| to become shy and stop talking to people |
| 变得羞怯；变得腼腆 |
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| If anyone spoke to her, she would just withdraw into her shell. 如果有人和她说话，她就会显得很腼腆。 |
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