Hard vacuum seal
[化] 强真空密封
🧩 词语组成解析
hard
[hɑrd]
adj. 困难的;硬的;有力的;努力的;
adv. 努力地;猛力地;严重地;沉重地;
n. 英〉硬海滩，登陆处;
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
Good-bye, Richard, and good luck. See you in two weeks.
再见， Richard， 祝你好运。两周后见。
Since the contract is about to expire, shall we discuss a new one?
这个合同将到期，我们来谈谈新合同的事宜吧。
He's doing very well in the navy.
他在海军里干得很出色。