a bullet-proof vest的用法和样例：
- Do you understand what I'm trying to tell you? - Yes. I'm chasing you with cupid's arrows, and you're flying about in a bullet proof vest.
- I felt on my right shoulder, through a thick parka, shirt, bullet proof vest, and T-shirt the coldest hand I have ever felt touch my skin.
- Troublemakers bullet proof vest As the name suggests is a malicious behavior, for retaliation against a person or a thing taken by means of an extreme. 9.
- A bullet describes a curved path in the air.
- He heard whizz of a bullet near his ear.