电动自行车英文叫做electric bike（又称e-bike或electric-assisted bicycle）。

电动自行车最初由人类在1896年发明，它主要用于提供额外的动力，帮助人们在骑行过程中更轻松地爬坡、维持速度或行驶距离。

例句：

I recently bought an electric bike and I love it! 我最近买了一辆电动自行车，我很喜欢！

The electric bike made it easy for me to commute to work every day. 电动自行车让我每天通勤变得更容易了。

I'm thinking about buying an electric bike because it's good for the environment and it's also good exercise. 我正在考虑买一辆电动自行车，因为它对环境有好处，也是很好的锻炼。