Installing a car battery is a simple procedure.

安装汽车电池是一个简单的程序。

Not yet. I'm charging the car's battery.

还不行，我正在帮车子的电池充电。

Alex is charging the car's battery.

因为亚力克斯正在将车子的电池充电。

Its fuel cell converts hydrogen’s energy to electricity that charges the car’s battery.

它的燃料电池将氢能转化为电能， 为汽车电池充电。

As it stands, battery cars that run on electricity from burning coal can be more polluting than cars that get good mileage on gas.

正如看到的那样，电动车从烧煤变为用电驱动，可是会比燃气行驶很多公里数的车造成的污染更多。