On and off for about three years.

断断续续差不多三年了。

He studied for his degree on and off for 75 years.

他断断续续学习了75年的时间。

The worst case scenario this time around, according to experts, is if Mount Agung erupts on and off for several months.

专家指出最坏的情况是火山爆发持续的时间不断断续续地持续月。

My community extends beyond people I know personally, which is why representation matters and why diversity on and off the screen have been a major priority for me, particularly for women, and particularly in lead roles.

的社区超越了人认识的人，这就是为什么代表性很重要，以及为什么银幕内外的多样性一直是的主要优先事项，特别是对于女性，尤其是在担任主角时。

Being disciplined was something that I could apparently turn on and off, but I could not do it intentionally and I could never figure out a way to duplicate it.

显然，自是自己可以控制开关的行为，但无法刻意去做，也无法想出复刻这种行为的方法。

The engineers are also trying to develop an on and off " switch" where the glow would fade when exposed to daylight.

工程师们还试图开发一开和关的 “转换开关”，当植物暴露在日光下时，它发出的光逐渐消失。

So usually, I would only be showing my class, and work, and event calendars, but I had this other calendar that showed all my professors' office hours that I could turn on and off at will.

通常显示的上课，工作和事件行事历，不过另外还有这行事历它显示所有教授的办公室时间可以随心情开启或关闭。

It's politically unstable and it's dealt with on and off conflict for years.

它的政治不稳定，多年来一直在处理冲突事件。

He's served on and off and on again since then and if this years vote goes his way again, he'll become Israel's longest serving prime minister ever, but he's facing a number of difficult challenges this time around.

从那之后他断断续续担任过以色列总理，如果今年能够连任，他将成为以色列历史上任职时间最长的总理，但此次竞选他也面临着很多挑战。

These are young people who are making impressions and differences on and off the field.

这些年轻人在场上和场外都留下了深刻的印象。

We've got this granted patent that allows us to turn on and off that card to only be used at the theatres where you say you want to go and buy a ticket.

们被授予此项专利权，可以允许们打开和关闭员卡的使用权，当你在电影院想购票时，员卡才被使用。

Some have been closed on and off as cases of COVID have come and gone.

随着新冠肺炎病例的出现和消失，有些陆陆续续地关闭了。

This allows 15 minutes to get on and off the coach, 45 minutes for the guided tour and 30 minutes for after-tour activities.

15分钟上下车，45分钟讲解游览，30分钟的参观后活动。

The bird's lights blink on and off.

这燕子标志灯一闪一闪的。

A timer turns your lights on and off.

定时器可以为你定时开关电灯。

I started taking medication on and off, and well, it was pretty obvious.

开始有偶尔才吃药， 嗯，这挺明显的。

Plus, they're super easy to toggle on and off.

另外，它们非常容易开关。

I've been living here on and off for nine years.

断断续续在这里住了九年。

Sparks were emitted from small black boxes and red lamps flashed on and off angrily.

小黑盒子里迸出火花，红色灯泡发怒似地忽明忽暗。

Many people flicked their headlights on and off, bathing me in a stuttery glow.

许多人把车头灯闪了又灭，将笼罩在明灭的光照里。