The fish are among the hardest to catch and keep in captivity.

该鱼很难捕捉，很难抑制束缚。

youdao

Some fish could not be keep in captivity , because they belong to the sky.

有的鱼是永远都关不住的，因为它们属于天空。

youdao

Conservationists said that with none in zoos and almost nothing known about how to keep them in captivity, if the species vanish in the wild they will be extinct.

环保人士表示，动物园没有一头武广牛，也没有一个人知道如何将它们圈养。如果这一物种在野外消失，便意味着它们从此灭绝。

youdao

Such tools also include the authority to detain terrorist suspects and keep the ones already detained in captivity, the officials said.

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