不时;断断续续地;间歇地;启闭;

"I have worked there on and off for almost ten years," says Gin .
"我在那里断断续续地工作了将近十年,"金说。
来源:高考真题- 2016 四川 阅读C骑自行车的人常常骑上人行道(本来是行人专用)又下来,还骑得很快,而且他们觉得自己有闯红灯的特权。
来源:高考真题- 2015 湖南 阅读AThere is something wrong with the traffic light because only the red light flashes on and off.
交通灯出故障了,只有红灯一直在闪。
来源:《外研社英语同义词辨析词典》夏天是休养整顿、并处理一年中积压事务的时候。
来源:《牛津高阶英汉双解词典》Don't confuse me with technicalities —— all I need to know is how to turn the machine on and off.
细节性技术我搞不懂,别讲了,我要知道的只是机器怎么开关.
来源:《简明英汉词典》Sparks were emitted from small black boxes and red lamps flashed on and off angrily.
黑色的小盒子里发出火花,红灯刺目地忽亮忽灭.
来源:《用法词典》It is a workshop where workers are required to clock on and off.
这是一个要求工人上下班都要登记时间的工厂.
来源:《现代汉英综合大词典》The boat , which was swinging in an eddy, came on and off and pitched with violence.
飘荡在旋涡里的渡船, 一上一下猛烈地颠簸起来.
来源:词典精选例句This low-impact exercise involves stepping on and off a platform following routines to music.
这一低强度锻炼的内容包括在伴随音乐做完固定动作之后重复踏上踏下平台。
来源:《柯林斯高阶英汉双解学习词典》She was the ideal American teenager, both on and off screen.
无论是在荧幕上还是在生活中,她都是人们心目中完美的美国青少年。
来源:《柯林斯高阶英汉双解学习词典》微语录 · 经典语录
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