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
Yes, it is. Come up.
是的 是我。请上来
I beg your pardon!
对不起！
The doctors have not yet decided how the woman died.
医生们至今还未确定这位妇女的死因。