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The bicycle is one of the most important vehicles in the world.
自行車是世界上最重要的交通工具之一。
In every country people use bicycles for work, for sport or just for fun.
在每個國家，人們都用自行車上班、鍛煉或者只是為了玩。
Bicycle riding is good exercise.
騎自行車是很好的運動。
It helps people become fit.
它讓人們變得更健康。
Bicycle riding can make the riders' hearts and lungs strong.
騎自行車能夠讓騎手的心臟和肺部變得更強。
It is also good for the environment because bicycles do not cause pollution.
它對環境也有好處，因為自行車不會帶來污染。
Bicycles share the road with cars and trucks.
自行車和轎車、卡車走相同的路。
Drivers do not always notice bicycles.
司機們通常不會注意到自行車。
So bicycle riders must pay attention to the traffic around them and know traffic signals.
所以自行車騎手一定要注意周圍的交通環境和交通信號燈。
They must know and obey the safety rules.
他們一定要了解并遵守安全規則。
They must wear helmets to protect their heads.
他們必須戴頭盔以確保自己頭部的安全。
When riding at night, they must wear light-colored clothes, and have lights in the front and reflectors on the back of their bicycles.
晚上騎車的時候，一定要穿淺色的衣服，并且在自行車前面裝上車燈，后面要有反光片。
An accident on a bicycle may be serious.
自行車發生事故會很嚴重。
In case of an accident, bicycle riders should know how to give first aid.
為了以防萬一，自行車騎手需要知道如何進行急救。
If an injury is serious, they must call 120 for help.
如果受傷很嚴重，一定要打120求救。
In a word, the best way to be safe is to be careful.
總之，確保安全最好的方式就是小心。
