| 单词 | 洄游 |
| 释义 | 〔shad〕Any of several food fishes of the genusAlosa, especially the North American species A. sapidissima, related to the herrings but atypical in swimming up streams from marine waters to spawn. 鲱鱼：一种西鲱 属食用鱼，尤指北美种 美洲西鲱 ，和鲱鱼有关但并不典型地从海中洄游溪流产卵 〔run〕To migrate, especially to move in a shoal in order to spawn. Used of fish.洄游：移动，尤指为产卵而在浅滩游动。用于指鱼〔run〕The migration of fish, especially in order to spawn.洄游：鱼群的洄游，尤指为了产卵 |
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