safety bicycle 安全脚踏车 ; 安全自行车
Rover Safety Bicycle 安全自行车 ; 路华安全脚踏车
safety bicycle detail 安全自行车
bicycle safety fork 自行车保险叉
Bicycle Safety 自行车安全
Bicycle than vehicle safety 自行车比汽车安全
Bicycle than car safety 自行车比汽车安全
Bicycle Rider Safety 骑车人交通安全
bicycle Vintage Safety Back 自行车背复古单车牌
Bicycle Safety Tips 骑车者戒
Mariah Nunes, a sophomore who is a team manager, said she researched an essay on bicycle safety.
校队经理同时也是大二的玛丽亚·纽恩斯说她在研究一篇有关自行车安全的论文。
In some parts of the world, cyclists have been powering safety lights for years with devices called bicycle dynamos, which use a generator to create alternating current with every turn of the wheels.
在世界的一些地方，骑自行车的人已经通过叫自行车发电机的装置产生了多年的安全电能。当自行车车轮转动的时候一个装在上面的发电机就会产生交流电。
However, the penny farthing's popularity lasted only about 20 years, until the advent of the safety bicycle.
不过，随着安全自行车的出现，这种车子只流行了大约20年。
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