booster cables, flares, tire pump, and a bag of sand or cat litter (for traction);
汽车急救线、照明灯、轮胎打气泵和一袋子的沙土或者猫砂（增加牵引力）。
2
The heart beats like a bag of worms instead of a pump.
心脏跳起来像一只装着蠕虫的袋子而不像一个泵。
3
In addition, some power seats have a lumbar adjustment that USES a small air pump to inflate a bag or bags on the lower back of the seat to serve as a pillow.