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
I honestly didn't mean it.
我的确不是故意的。
Is there anyone who can speak English.
请问有没有会讲英语的？
You have to be able to check instructions.
你必须会查对说明。你必须会筹划工作。