When I pulled out of the space, I nicked the rear bumper of the car in front of me.

我把车从车位开出来时，蹭到了我前面那辆车的后保险杠。

《柯林斯英汉双解大词典》

Car sensors that detect the distance between your bumper and the car in front of you can prevent a sweep of brake-slamming that can tie up traffic, for example.

比如说，能够检测你的汽车保险杠与前方汽车距离的感应器，可以防止可能造成交通停滞的紧急刹车。

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The bumper is below the two beams sticking out of the front.

缓冲器位于前面的两道横梁之下。

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Along with sister-vehicle the LF-CC, the coupe will serve as design inspriation for the 2014 IS. Look for the rear bumper, front grille and wheel arches in production vehicles over the next few years.

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Beneath the bumper, the front end is finished by stainless-steel-style trim and integrated underbody protection.

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In May it will release its first car fitted with an airbag beneath its bonnet which will inflate if sensors in the front bumper detect they have come into contact with a cyclist or pedestrian.

BBC: Volvo unveils cyclist alert-and-brake car system