In the past, there were only single-decker buses. Nowadays, some buses are double-decker buses.

在过去，只有单层公车，而现在，很多都是双层的公交车。

youdao

In the past, there were only single-decker buses. Nowadays, some buses are double-decker buses.

在过去，只有单层公车，而现在，很多都是双层的公交车。

youdao