骑自行车不仅可以帮助我们强身健体，而且它非常环保。

Not only can riding bicycles help build up our body, but it is also very environmentally friendly.

youdao

骑自行车不仅可以帮助我们强身健体，而且它非常环保。

Not only can riding bicycles help build up our body, but it is also very environmentally friendly.

youdao