The President's car was escorted along the way by four polices motorcycle.是什么意思？

The President's car was escorted along the way by four polices motorcycle.

四辆警察的摩托车一路护卫著总统的汽车.

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。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

escorted

v. 护送，护卫( escort的过去式和过去分词 )；

例句
We were escorted through a low doorway.
我们在人陪同下穿过一条低矮的门道。

along

adv. 一起，向前，进展，到某处；prep. 沿着，顺着，靠着…边；

例句
The helicopter can zip along at about 150 kilometres an hour.
该直升机能以每小时150公里左右的速度疾进。

way

n. 道路，方法，方向，某方面；adv. 远远地，大大地；

例句
The way that American history is taught may change in order to accommodate some more of those cultures.
美国历史的授课方式可能会为了照顾到更多的文化而作改变。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

four

num. 四，四个，第四；n. 四个人（或事物）的一组，得四分的一击，四人赛艇；

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。

polices

v. （警察、军队等）巡查( police的第三人称单数 )，维护治安，（委员会等）监督，管制；

例句
...IMRO, the self-regulatory body that polices the investment management business.
投资管理监管组织，监督投资管理业务的自律机构

motorcycle

n. 摩托车，机动车；vi. 骑摩托车；

例句
The gunman escaped on a motorcycle being ridden by an accomplice.
持枪歹徒坐上一辆由同伙驾驶的摩托车逃逸。