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
I think you're going to be very happy here with us.
我想你和我们住在一起会很愉快的。
How was your flight? Was it comfortable?
你坐的班机怎么样？还舒服吗？
The sea journey lasted over sixty days and nights.
海上航行持续了60多个昼夜。