Dropping brings thousand of people to Downhill Mountain Biking. Gravity is a merciless teacher.

坠落，把数以千计的人带到山地速降运动。重力，是一个无情的老师。

youdao

Dropping brings thousand of people to Downhill Mountain Biking. Gravity is a merciless teacher.

坠落，把数以千计的人带到山地速降运动。重力，是一个无情的老师。

youdao