They can use energy from the sun or can be hand-powered.

它们可以使用太阳能或手动供能。

youdao

The hand-powered spinning jenny was patented by James Hargreaves in 1770.

手动的珍妮纺纱机是哈格里夫斯在1770年取得专利。

youdao

In two thousand one, a Canadian inventor Jock Brandis designed a hand-powered peanut sheller for a village in Mali .

在二零零一年，一位名叫乔克-布兰迪斯的加拿大投资者为马里的一个村庄设计出了一种手动的花生去壳器。

youdao

The final product is deceivingly simple: a collapsible, 10-inch-long, hand-powered inhaler made of plastic and metal that weighs 4 ounces.

FORBES: Easy As Breathing

On the other hand, diesel-powered cars tend to last longer and retain a higher resale value.

FORBES: Are Americans Ready To Embrace Diesel Cars? Chevy Hopes So

Unlike most conventional prosthetics, this hand boasts five individually-powered fingers -- including a fully rotatable thumb.

CNN: Bionic hands controlled by iPhone app