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
We aren't going, for the simple reason that we can't afford it.
我们不去，原因很简单，我们负担不起。
When was the last time he wrote you ?
他给你写最后一次是什么时候？
That is how Annie came to be with us.
这就是安妮和我们在一起的缘由。