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
You made a favorable impression on the examiners.
你给主考留下了很好的印象。
Look over to the southeast and you can see the con stellation of Orion.
眺望东南方向，你就可以看到猎户星座。
Keep quiet! The baby is sleeping.
安静！娃娃在睡觉。