Aerofloats
二乙基二硫代磷酸鹽
??? 情景例句
My friend's a chain smoker.
我的朋友煙癮很重。
How did he get away with cheating?
他是如何考試做弊而未被發現？
What was the population of the more developed countries in 1950?
1950年較發達國家的人口是多少？