Allergen
n. 变(态反)应原\\n[化] 过敏素; 变应原
🗣️ 情景例句
why you have so many problems with math.
为什么你在数学方面有那么多问题。
It's impossible. You may notice that the cost of raw materials has gone up in recent years.
不可能，您可能注意到了近年来原材料的价格上涨了。
I went on an excursion recently, but my trip took me longer than I expected.
最近我作了一次短途旅行，但这次旅行所花费的时间比我预计的要长。