例句：

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

　　它的頭骨也是沒(méi)有氣孔的，這是鯨類(lèi)動(dòng)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(lèi)相似，但它的下顎骨沒(méi)有現(xiàn)代鯨魚(yú)用來(lái)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(lèi)專(zhuān)家對(duì)于鯨魚(yú)能完全逃離油污帶不抱希望。