They may have a home to shelter themselves but it does not have powersupplies, a telephone or plumbing.
他们可能会有一个栖身之所,但里面没有电源供给、电话或管道设施。
2
These appliances should not be connected to powersupplies.
这些装置不应该接通电源。
《柯林斯英汉双解大词典》
3
Today, rivers are controlled for many reasons, primarily to maintain reliable water supplies for daily, agricultural and industrial needs, for power generation, for navigation, and to prevent flooding.