英语语法分析

The first organisms that reproduced sexually were free-floating plankton.

最早的有性繁殖生物是自由漂浮的浮游生物。

《柯林斯英汉双解大词典》

This book has large color photographs of sea animals, from plankton to clownfish to orcas.

这本书有许多海洋动物的彩色照片，从浮游生物到小丑鱼乃至逆戟鲸。

This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.

海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。