mains
US /meɪnz/
UK /meɪnz/
复数名词
市电, 主管道
the principal supply of electricity, water, or gas to a building or area
示例:
•
The house is connected to the electricity mains.
房子接通了市电。
•
Always unplug the appliance from the mains before cleaning.
清洁前务必拔掉电器电源。