Ventral fin
n. 腹鳍
🧩 词语组成解析
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 I've completely forgotten about all my business problems.
但我已经彻底抛开了我所有的业务上的问题。
Does this bus go to the beach?
这辆公共汽车去海滨吗？
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，