All buildings would be electrically heated , never mind the thermal conversion rate .

所有的建筑物都应当由电力供能，不用担心其热量转化率。

And instead of being powered by smoky little petrol engines , they are driven electrically .

而且它们由电力驱动，代替了少烟的汽油发动机动力。

But barely 1 % of industry sales last year were hybrid or electrically powered vehicles .

但是，在去年的行业销售中，仅有不到1%来自于混合或电动车辆。

They could power electrically driven wheels , letting an aircraft taxi without using its main engines .

它们可以给电力驱动的起落架轮子动力，让飞机不用主引擎就能在地面滑行。

A quarter of the weight of hb-sia is accounted for by its lithium-polymer batteries , which will power the four electrically driven propellers during the first test flights .

锂聚合物电池占hb-sia重量的四分之一，在第一次测试飞行中，它将会驱动四个电力螺旋桨。