1.脊鳍
1.a single fin on the back of a fish or other water animal such as a dolphin that gives it stability while swimming.
1.Buck admitted being pulled along by the dolphin by grabbing hold of its dorsal fin and Jukes said he had stroked its belly.
巴克承认藉由抓住海豚的尾鳍，被牠拖曳而行，裘克斯则说他抚摸牠的肚腹。
2.Long and slender with a dorsal fin the length of its body, the oar fish resembles a snake.
长且薄，带着一条跟其身体一样长的背鳍，它们看上去像一条蛇。
3.Cymbospondylus had no dorsal fin and its tail was long like an eel's.
杯椎鱼龙没有背鳍，尾部像鳗鱼一样扁长。
4.any of various food and sport fishes of the United States Atlantic coast having an elongated body and long spiny dorsal fin .
生活在美国大西洋沿岸、身体细长且长有长长背鳍的多种食用和猎用鱼。
5.Any of several whales of the family Balaenidae, characterized by a large head, whalebone plates in the mouth, and absence of a dorsal fin.
露脊鲸：露脊鲸科中的几种鲸，特征为头部硕大、嘴边长有鲸须而无背鳍。
6.Some wag had named her after a small black hole in her dorsal fin which looked, to him, like a cigarette burn.
而一些人则开玩笑地称她为“黑洞”，原因是她背鳍上面有一个小黑窟窿，好像是被烟头烫过似的。
7.They are cobalt-blue on top and silvery-white below, with a pronounced dorsal fin and a long, lethal, spear-shaped upper jaw.
它的顶部是钴蓝色，下面和银白色；有着明显的背鳍，还有着长长的、能致命的矛状上颚。
8.Any of various brightly colored tropical Pacific scorpion Fishes of the genus Pterois, having venomous spines in the dorsal fin.
蓑一种太平洋赤道地区产蓑属色彩鲜艳的锯鱿鱼，背鳍上有毒刺
9.A primitive, bony freshwater fish(Amia calva)of central and eastern North America, with a long, spineless dorsal fin.
弓鳍鱼北美洲中部和东部的一种原始、多骨的淡水鱼（弓鳍鱼弓鳍鱼属），具有长的无脊的背鳍
10.The dorsal fin acts as a keel, giving the dolphin some stability as it swims.
作为龙骨的背鳍，因为它使一些稳定海豚游泳。