单词：larval stage
larval stage的用法和样例：
例句
- While in their larval stage, giant clams must swim and feed in the water column.当它们的幼虫期，巨蛤蚌必须游泳和喂养在水柱。
- Peculiarities in the silkworm are known to appear at the corresponding caterpillar or cocoon stage.蚕体的性状，亦限于相当的幼虫期或蛹期出现。
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