1、
a bumper sticker (= a sign that people stick on the bumper of their cars with a message on it)
贴在保险杠上的小标语
《牛津高阶英汉双解词典》
2、
3、
Some of these ads are small like a bumper sticker but others can cover entire car.
有些广告比较小,比如招贴画那样的,还有些可能要覆盖整个车身.
互联网摘选
4、
