名词
中文翻译：背鳍
同义词：
['dorsal ray', 'dorsal spine', 'dorsal fins例句：1. The fish swims with its dorsal fin upright.（这条鱼用它的背鳍垂直游动。）']
例句：
-
1. The fish swims with its dorsal fin upright.
这条鱼用它的背鳍垂直游动。
-
2.The dorsal fin is the most visible part of the fish's body.
背鳍是鱼身上最显眼的部分。
-
3.The dorsal fin helps the fish to swim efficiently.
背鳍有助于鱼类高效游泳。