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　　Big analysis of 6 bicycle riding methods自行车6种骑行方法大剖析

　　There are many advantages of cycling exercise, it is unlimited time, unlimited speed.

　　骑自行车锻炼的好处有很多，它不限时间、不限速度。

　　There is no noise, no pollution, more can make physical and mental health, but also can walk with like-minded friends, is a healthy way of fitness.

　　骑车没有噪音、没有污染，更能让身心健康，还能和志同道合的朋友同行，是健康的健身方式。

　　Some people are used to riding slowly, insisting on a longer period of time;

Obey the traffic rules: ‌ When riding a bicycle in the United States ‌ must obey all traffic laws and road signs.

　　遵守交通规则：‌在美国骑自行车时，‌必须遵守所有的交通法规和路面标志。

The origins of the electric motor date back to the early 19th century, when hand-made ferromagnets and coils were used to produce the electromagnetic force and achieve the original motor design.
电机的起源可以追溯到十九世纪初期，当时通过手工制造的铁磁体和线圈，来生产电磁力并实现了最初的电机设计。