Homocercal fin
正尾鳍
🧩 词语组成解析
a. (鱼的)正型的
fin
[fin]
n. 鱼鳍;鳍状物;（汽车、飞机、炸弹上的）尾翅;散热片;
vt. 给…装上翅片;切除鳍;
vi. 潜泳;（猛烈地）拍动（鳍）;
🗣️ 情景例句
And the show will help promote it.
而这次展览会有利于促销它。
What would you like to do today?
今天你想做什么？
Mum, I don't feel very well.
妈，我感觉不舒服。