Heliox
n. 氦氧混合气(含98%氦和2%氧,供潜水员在深水中维持呼吸用)
🗣️ 情景例句
Good afternoon, sir.
下午好。
I generally agree with you.
我大体上同意你的看法。 九、 Asking For Help 请别人帮忙
for their house, which had sound foundations, would have stood stoutly even if it had been almost submerged.
因为他们的房子地基牢固，即使洪水几乎灭顶也不会倒塌。