on the pin

• 留神

on the pin的用法和样例：

例句

1. Mind you don't bump your head on the low ceiling.
   天花板很低，留神别碰头。
2. Be careful in crossing the road.
   过马路要留神。
3. Fasten on what the teacher is saying.
   注意听老师说。
4. I noticed scores of sorrow on her face.
   我注意到她脸上悲痛的痕迹。