It has since been refilled using water pumps powered by the sun.

后来，人们用太阳能驱动的水泵将其重新灌满。

In 1928, doctors developed a portable, metal device with pumps powered by an electric motor.

在 1928 年，医生发明了一种便携式金属装置，气泵由电动机供能。

I think we have about 10 generators on property that are all pumping out power to all the different places around the show.

我们有大约十台发电机，这些发电机都在向展览周围所有不同的地方供电。

For example, fresh running water was introduced in cities by  the late 19th century, as water pumps powered by steam engines were used.

例如，在 19 世纪后期，城市引入了新鲜的自来水，因为使用了由蒸汽机驱动的水泵。