Convexo-concave seal face
[化] 凹凸密封面
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
face
[fes]
n. 面容;表面;脸;方面;
vt.& vi. 面对;面向…;正视;承认;
vt. （感到不能）对付;（明知不好办而）交谈;必须对付（某情况）;面临…;
face=fac表示脸、面 → 脸；表面；外表
🗣️ 情景例句
The way to learn a language is to practice speaking it as often as possible.
学习一门语言的方法就是要尽量多地操练说出它来。
He is something.
他是重要人物。
He is swimming across the river.
他正横渡小河。