It takes several weeks of off-and-on practice to master the various knife techniques, but once learned they are never forgotten.
你要花上数周的时间不时地练习练习才能掌握各种刀法技巧，但一旦学会就再也不会忘记了。
The pursuit of a genuine variety of opinions that are well thought through and well grounded is essential. But that has an off-and-on, hit-or-miss connection with ethnic and racial diversity.
“对于我和很多学者来说，真正有意义的多元化是课堂上思维的多元化，”他说，“对于经过仔细推敲、有充分依据、真正多样化的见解的追求才是最根本的，那跟民族和种族的多元化并没有什么必然的联系。”
Off came her sneakers and on went a pair of stilettos.
她脱下运动鞋，穿上一双细高跟鞋。
It was Mrs. Dearden's day off, and Paul was on duty in her place.
那天是迪尔登夫人休息日，保尔替她上班。
He flung off his coat and collapsed on the sofa.
他随手脱掉大衣，倒在沙发上。
The company is selling off some sites and concentrating on cutting debts.
该公司正在变卖一些地皮，全力削减债务。
雨断断续续地下了一整天。
I left my car in a lay-by and set off on foot.
我把车留在路侧停车带，开始步行。
Just buzz off and let me get on with my work.
走开，我得继续干活了。
Sam was flicking a flashlight on and off.
萨姆正啪啪不停地开关着手电筒。
A neon sign flashed on and off above the door.
门上方霓虹灯忽明忽暗地闪烁着。
The rugby tour was a disaster both on and off the pitch.
这次橄榄球巡回赛在场上、场下都彻底失败。
I was still working on and off as a waitress to support myself.
我仍然有时做女招待来维持生活。
I've been involved with pubs off and on for ten years.
我从事和酒吧相关的事业加起来有十年时间了。
I have lived here off and on since 2007. I am a journalist.
从2007年起，我就断断续续地住在这儿。我是一名记者。
雨忽而下，忽而停。
It drizzled off and on all day.
毛毛雨已经时停时续地下了一整天。
Rather, this is something that I have been thinking about, off and on, for some time.
相反，这是我一直在思考的，断断续续地一段时间中形成的。
Lest readers charge me with conflict of interest, I should add that, though we've stayed in touch off and on, we've never socialized.
为了避免读者指责我利益冲突，我应该补充一点，虽然我们保持着时有时无的联系，我们从来没有一起社交过。
We worked for a couple of weeks (off and on) and finally solved this problem.
我工作了两个周(断断续续的)最终解决了这个问题。
The Jews and Arabs of Palestine have been fighting off and on for 100 years.
巴勒斯坦的犹太人和阿拉伯人已经断断续续地斗争了100年之久。
They drank, off and on, for several days.
他们断断续续地喝了好几天。
By increasing or lessening the hours of darkness in each day, the scientists have been able to turn plant growth off and on like an electric switch.
用增加和减少每天黑暗小时数的方法，科学家已经能够控制植物生长，如同控制一个电器开关。
There are plenty of resources (both off - and on-line) that will help you cross those business process Bridges when you get to them.
当你要开始的时候，有很多在线或者网下的资源可以帮助你跨过这些工商程序。
The next step was the lengthy process of turning parts of the system off and on to see what made a difference.
接下来一个漫长的过程开始了，他们把系统的各个部分逐一打开、关闭，看看前后有何区别。
Managing extensions by turning them off and on can be a major hassle, especially since it requires a restart of the browser - but there is a solution.
关闭或开启扩展可能是一个大麻烦，特别是它需要重新启动浏览器-但这里有一个解决办法。
And because the trimmer can be turned off and on with the flip of a switch, it is also more convenient than gas-fueled models: There's no temptation to idle it.
而且由于这款剪草机只需轻按按钮就能开关，因此它比汽油动力的型号用起来也更方便：你有什么理由拒绝它呢？
He was a former industrial-arts teacher whom my mother dated off and on for much of my childhood.
他以前是教工业艺术的老师，在我童年的记忆中，他和妈妈总是分分和和。
Yahoo! And Microsoft have been talking, off and on, since last year.
雅虎和微软自去年起进行了断断续续的谈判。
Yahoo! And Microsoft have been talking, off and on, since last year.
雅虎和微软自去年起进行了断断续续的谈判。
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