n. the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose
n. 幼虫
[医] 幼虫(昆虫), 蚴(蠕虫)
1. The caterpillar is the larva of a butterfly.
毛毛虫是蝴蝶的幼虫。
2. After a few days, the larva will start to grow into a pupa.
几天后，幼虫会开始变成蛹。
3. Many insects go through a larval stage before becoming adults.
许多昆虫在成为成虫之前会经历幼虫阶段。