Preemergence
a. (植物種子)出土前的,出土前施用的
??? 情景例句
It is nice of you to invite me to the party tonight.
你真好，邀請我參加今晚的聚會。
I tried to call you, but the line was busy.
我試著給你打電話，但老占線。
This is because the surface of the earth is not flat but round.
因為地球表面不是平的，而是圓的。