Vacuums
n. 真空, 真空状态, 真空度, 空洞, 真空装置, 真空吸尘器, 空虚
🗣️ 情景例句
I'm afraid i've brought you a lot of trouble.
恐怕我给你带来了不少麻烦。
You've inherited a large estate!
你继承了一大笔遗产嘛！
so every so often a sample is obtained with a coring bit.
因此时常要用取芯钻头取样。