名词
中文翻译：硬壳
同义词：
['hard outer layer', 'hard shell', 'hard outer cover']
例句：
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1. The turtle has a hard-shell that protects it from predators.
乌龟有一层硬壳，可以保护它免受捕食者的伤害。
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2. The carpenter used a hard-shell to make the cabinet.
木匠用硬壳制作了橱柜。
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3.The bird's hard-shell is strong enough to withstand harsh weather conditions.
鸟的硬壳足够坚固，能够抵御恶劣的天气条件。