21. jumper cable
/ˈdʒʌmpər keɪbl/
one of two cables that are used to start a car when it has no power in its battery.
The jump cables connect the battery to the battery of another car.
跨接引线（用以将汽车上无电的电池连接到另一汽车的电池上以发动汽车）
22. spare tire = spare tyre
an extra wheel for a car
23. lug wrench
A lug wrench is a tool used for car wheels. It helps to make lug nuts on the wheels tight or loose. Lug nuts are small pieces that keep the wheel on the car. The lug wrench can be shaped like an "L" or an "X". It has a part that fits onto the lug nuts. This tool is important if you need to change a flat tire.
24. jack
/dʒæk/
a piece of equipment used to lift a heavy weight off the ground, such as a car, and support it while it is in the air
千斤顶
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