复数： cetaceans

The sperm whale is believe to dive deeper than any other cetacean .

人们相信,抹香鲸比其他鲸类动物潜得更深.

The sperm whale is believed to dive deeper than any other cetacean .

人们相信,抹香鲸比其它鲸类动物潜得更深.

Both the methods and the findings are the first of their kind , according to laela sayigh , a cetacean biologist at the woods hole oceanographic institution in massachusetts .

所有的方法和发现都是好的开始，马萨诸塞州伍兹霍尔海洋研究所的鲸鱼生物学家laelasayigh说。

Cetacean brains are also , scaled appropriately for body size , almost as big as those of humans and significantly bigger than those of great apes , which are usually thought of as humanity 's closest intellectual cousins .

鲸类的大脑与其身体大小比例十分合适，几乎与人体比例一样大甚至于远远高于那些通常被认为是最接近人类智慧的近亲大型猿类。

The marine biologists now hope to use the system to collect more reliable data on cetacean numbers and movements , affording further clues to their behaviour .

现在，海洋生物学家希望能利用这些探测系统采集到更多的鲸类数量和游动的数据，以便于为研究它们行为提供更多线索。