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
Bye.
再见。
It'll probably clear up this afternoon.
今天下午可能放晴。
You can't buy them in the shop before eight o'clock.
上午八点之前你在商店里是买不到东西的。