Retainer seal
[化] 护圈密封
🧩 词语组成解析
retainer
[ri'teinə]
n. [机]承盘，挡板;家臣，侍从;[牙科]牙架;保持着;
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
🗣️ 情景例句
Bye, see you later.
后会有期。
You'll be sick, if you aren't careful.
你不小心的话，就会生病。
I'm OK. Sam, what are you going to do tomorrow?
我也很好。山姆，你打算明天做什么？