自行车嘎吱作响
Bicycle crunches. I don't normally recommend crunches, but these use a good combination of core muscles. (Video. )───踩单车。我一般不推荐踩单车,但这其实可以运动到一些关键肌肉。(视频)
bicycle races───自行车竞赛
bicycle race───自行车竞赛
bicycle racks───自行车托架
bicycle chains───自行车链条
bicycle clips───n.裤管夹
bicycle kicks───倒钩球
bicycle paths───自行车道