例句：

　　The skull also lacks a blowhole, another cetacean adaptation for diving.

　　它的頭骨也是沒有氣孔的，這是鯨類動物為潛水而作出的另一適應。

　　The skull is cetacean-like but its jawbones lack the enlarged space that is filled with fat or oil and used for receiving underwater sound in modern whales.

　　它的頭骨與鯨類相似，但它的下顎骨沒有現代鯨魚用來接收水下聲音的、充滿脂肪或油脂的擴充空間。

　　Cetacean experts do not expect whales to escape this slick completely.

　　鯨類專家對于鯨魚能完全逃離油污帶不抱希望。