on and off

常见例句

Grid provides an infrastructure that you turn it on and off as needed.
可以根据需要打开和关闭网格提供的基础设施。
In plants, for example, it is one of the things that switches other genes on and off at their promoter sites.
例如, 在植物里, 其中的一个行为是在基因的启动子区域里开启和关闭其他基因.
Using this plug-in provider, you can model your staff queries for any plug-in, and switch authorization during your tests on and off by simply changing the staff plug-in provider JNDI name for a task.
使用此插件提供程序，您可以针对任何插件建模您的人员查询，并且在打开和关闭测试期间，仅通过更改任务的人员插件提供程序 JNDI 名称就可切换授权。

Bob Doughty and Faith Lapidus tell about some of the winning American athletes on and off the ice and snow.
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。
麻省理工公开课 - 媒体、教育、市场课程节选
I study on and off in Baruch College
我断断续续的柏鲁克分校学习，
在纽约的感受 - SpeakingMax英语口语达人

The screen can also be turned on and off using the switch, enabling one-touch operations.
ENGADGET: blogger-avatar
So what remains on and off the table is something for them to decide.
WHITEHOUSE: Press Briefing
There has been speculation on and off about a free e-reader hitting the market for years.
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