on and off switch 通断开关 ; 电源开关
on-and-off controller 开关式控制器 ; 双位开关控制器 ; 开关控制器
on-and-off 断断续续地 ; 间歇地
on and off stage 台上台下
switch on and off 开关通断
on and off limit 投入门限与切除门限
on and off the plane 上和下飞机
off and on 断断续续 ; 间歇地 ; 不时地
雨断断续续地下了一整天。
"I shall sit here," he said, "on and off, for days and days."
“我要坐在这儿,”他说,“断断续续地坐上好几天。”
Bob Doughty and Faith Lapidus tell about some of the winning American athletes on and off the ice and snow.
VOA: special.2010.02.26
We can actually see spatially all the details in the field animated as you turn the current on and off.
我们能看到,所有细节的空间动画分布,就在你打开电流和切断的时候。
I study on and off in Baruch College
我断断续续的柏鲁克分校学习,
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