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(yīng)。

　　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(xiàn)代鯨魚用來接收水下聲音的、充滿脂肪或油脂的擴(kuò)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。