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如今,自行车在大城市仍然很受欢迎,骑车上学或上班都很方便。但是边骑车边用手机导航让很多人无法集中注意力骑车。本文介绍了一种安全、易操作的智能自行车导航仪。As bicycles become an increasingly popular form of transportation in big cities,the number of accidents is also on the rise.