Baleen whales often appear in this region. Be careful!

这一带经常有须鲸出没, 要注意安全啊!

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But big baleen whales often run silent.

而大型须鲸常常不声不响地前行.

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The collection of small marine crustaceans of the order Euphausiacea are the principal food baleen whales.

形似虾的浮游甲壳动物;是长须鲸的主要食物来源.

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Large baleen whales primarily use the lower frequencies and are often limited in their repertoire.

大长须鲸最初使用低频,他们的全套本领很有限.

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