It's very difficult, however, to fall off of an exercise bike.

这是非常困难的，但是，脱落的自行车锻炼。

youdao

I do exercise every day. I run for half an hour very morning, then go to school by bike.

你身体好，每天锻炼身体，早晨跑步半小时，然后骑车上学。

youdao

I do exercise every day. I run for half an hour very morning, then go to school by bike.

你身体好，每天锻炼身体，早晨跑步半小时，然后骑车上学。

youdao