a safety pin的用法和样例：
- The teen used a safety pin to help him escape.
- And you got a safety pin holding your boot up?
- A safety pin has a cover over its point.
- A safety pin has a metalcovering over the pointed end.
- She pinned the gown at the neck with a safety pin .
- She pinned the gown at the neck with a safety pin.
a safety pin的相关资料：