Circular flap
[医] 环形瓣
🧩 词语组成解析
flap
[flæp]
n. 扁平物;[航] 襟翼;拍打，拍打声;〈口〉不安，恐慌;
v. 上下或左右移动、摆动;轻拍;振翅而飞;
🗣️ 情景例句
The rules ought to be observed.
这些规则就予以遵守。
An occasion lost cannot be redeemed.
时机失了无法挽回。
Let me see. It's about four thirty.
我看看，大约四点半了。