名词
中文翻译：幼虫
同义词：
['larva', 'pupa', 'cocoon']
例句：
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1. The caterpillars are transforming into butterflies in the cocoon stage.
毛毛虫正在蛹阶段变成蝴蝶。
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2. The spider was busy spinning a new web during its pupal stage.
蜘蛛在蛹阶段忙着织新网。
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3.During the pupal stage, the caterpillar grows and develops its wings.
在蛹阶段，毛毛虫生长并发育翅膀。