英语语法分析

Anchoring themselves to blades of grass or fingers of coral with their tails, seahorses spend their time feeding on zooplankton.

海马常用尾巴将自己固定在水草或珊瑚枝上，以过往的浮游动物为食。

But daily vertical movements by zooplankton in the ocean—upward by night to seek food, downward by day to escape predators—can also be considered migration.

但是海洋中浮游动物每天的垂直运动——夜里上浮以寻找食物，白天下潜以躲避捕食者——也可以被视作迁徒。

Many theories have been formulated to explain the role of grazers such as zooplankton in controlling the excluded grazers from regions of high phytoplankton concentration.

人们提出了许多理论来解释食草动物，如浮游动物，在控制浮游植物高度集中地区的食草动物方面所起的作用。