Engineers there came up with an 11-pound battery-powered backpack with two electric engines.

那儿的机械师们设计了一个背包，该背包重11磅，靠电池充电，配备着两个电动引擎。

It turns out electric engines easily mess with AM's reception.

事实证明，电动发动机很容易干扰 AM 的接收。

We all know how a combustion engine sounds like, and we do actually also know how an electric engine sounds like.

我们都知道内燃机的声音，实际上我们也知道电动发动机的声音。

All bikes are fitted with an electric engine which will help you pedal back to the city after the delicious wine tasting.

所有自行车都配有电动发动机， 可帮助您在品尝美酒后骑车返回市区。

New electric engines coupled with artificial intelligence and autonomous systems will contribute to a more efficient, integrated transport system that is less polluting and less noisy.

新型电动引擎结合人工智能和自动化系统，将有助于打造出一个效率更高、污染更低、噪音更小的综合交通系统。