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
You mean from the food?
是不是吃东西引起的？
They are still lower than the quotations you can get elsewhere.
这些报价比其他任何地方都要低得多。
Can we substitute in these things?
这几项可以用替代品吗？