Allergens
(allergen 的复数) n. 变(态反)应原\\n[化] 过敏素; 变应原
🗣️ 情景例句
I think he'll sleep through the night now.
我想他现在会睡到天亮。
Do I have to make a reconfirmation?
我还要再确认吗？
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。