例句：
The skull also lacks a blowhole, another cetacean adaptation for diving.
它的`头骨也是没有气孔的，这是鲸类动物为潜水而作出的另一适应。
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.
它的头骨与鲸类相似，但它的下颚骨没有现代鲸鱼用来接收水下声音的、充满脂肪或油脂的扩充空间。
Cetacean experts do not expect whales to escape this slick completely.
鲸类专家对于鲸鱼能完全逃离油污带不抱希望。