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
If you find it unworkable, we have no other choice but to call the deal off.
如果不行的话，我们只好放弃了。
School should be a time for learning.
学生时代，应该学习许多重要的事情。
Maybe we could go shopping this evening.
或许我们可以今晚去买东西。