bumper
noun [ C ] uk/ˈbʌm.pər/ us/ˈbʌm.pɚ/
B2 保险杠
a horizontal bar along the lower front and lower back part of a motor vehicle to help protect it if there is an accident
Idiom
bumper to bumperidiom 车子一辆接一辆
with so many cars that are so close that they are almost touching each other
By eight o'clock the traffic was bumper to bumper. 到了8点钟，交通变得非常拥堵，车子一辆接一辆的。
bumper
adjective [ before noun ] uk/ˈbʌm.pər/ us/ˈbʌm.pɚ/
（数量）异常大的
larger in amount than usual
Farmers have reported a bumper crop this year. 据报道今年庄稼大丰收。