4-f
n. [美国英语]；选征兵役制中不及格者免除兵役(者)(指身体、心理、品德等不适于服兵役)的分类
🗣️ 情景例句
Yes, we'll be arriving by car about ten o'clock Friday night.
是的， 我们将于星期五晚上十点钟左右开车抵达。
Do you ever play basketball after school?
你曾经在放学后打篮球吗？
Yes, do please. That's a good idea.
对，就谈这个。那是一个好主意。