on and off

基本解释

• 断断续续地，不时地

同根派生

英汉例句

双语例句

• 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。

原声例句

• 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

权威例句

• The screen can also be turned on and off using the switch, enabling one-touch operations.
  ENGADGET: blogger-avatar

词组短语

短语

• on n and off 断断续续地;有时
• on shell and off shell 在壳和离壳
• on again and off again 分分合合
• switch on -and off 开关通断
• on -and off-balance sheet 表内和表外项目

英英字典

剑桥英英字典

• If something happens on and off during a period of time, it happens sometimes.