Pelvic fin
n. <动>腹鳍
🧩 词语组成解析
pelvic
['pelvik]
adj. 骨盆的，关于骨盆的;
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
He's writing to invite me
他写信邀请我
The president must have the approval of Congress to declare war.
总统若要宣战，必须获得国会的承认。
and see that nothing particularly alarming is happening to its companions.
并且看到自己的同伴身上没有发生让自己担惊受怕的事。