The switches close the contacts and complete the circuit.
这些开关可接通形成闭合电路。
Remove the circuit fuse before beginning electrical work.
开始电工作业之前取下电路保险丝。
The earth takes a year to make a circuit of the sun.
地球绕太阳运行一周需要一年的时间。
She made a slow circuit of the room.
她绕着房间缓缓地走了一圈。
I do circuit training once a week.
我每周做一次循环训练。