He jacked the car and changed the back tyre.是什么意思？

He jacked the car and changed the back tyre.

他用千斤顶把车顶起来更换后胎。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

jacked

N-COUNT 千斤顶；起重器；N-COUNT （纸牌中的）J牌，杰克；

例句
The bridge was high, jacked up on wooden piers...
桥很高，被几个大木墩托起。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

car

n. 汽车，车厢，轿车；

例句
His car was held up and he was abducted by four gunmen...
他的车遭遇拦劫，随后他被4名持枪歹徒劫持。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

changed

[医]变化的，改变的；

例句
Since the Sixties, afforestation has changed the Welsh countryside.
60年代以来，植树造林已经改变了威尔士的乡村面貌。

back

n. 背，背部，背面，反面，后面，后部，（椅子等的）靠

例句
He looked back at the abject, silent girl and repeated his question.
他转过头看着这个噤若寒蝉的女孩，又重复了一遍他的问题。

tyre

n. 轮胎；

例句
A lorry blew a tyre and careered into them...
一辆货车爆胎了，向他们猛撞了过去。