例句
There are several policemen on the street.
在街上有几个警察。
The policeman is helping the old man cross the road.
那个警察正在帮助老人过马路。
There are several policemen on the street.
在街上有几个警察。
The policeman is helping the old man cross the road.
那个警察正在帮助老人过马路。