You have some people who are working all the heavy traffic all the time and other people working hardly any traffic, and that doesn't make for good controllers, in terms of keeping up the proficiency.
这么做会导致有人总在交通高峰期工作而另一些人只在交通闲期工作，那样对控制员不好，不利于保持他们的效率。
But some oil watchers question whether OPEC is actually capable of boosting production and keeping it there for a long time.
不过有石油观察人士质疑道：石油输出国组织是否有能力提高石油产量，并在较长的时间内保持这种高产量？
One factor that can make them tough is spending time with difficult relatives. Here are some strategies for keeping family dinners pleasant.
令他们不快的其中的一个原因就是他们必须和一些难相处的亲友共度节日时光。
Some blog for the purposes of keeping an online diary, while others blog because blogging does have a great profit potential. Here are 3 time-tested tips to create amazing blogs.
一些博客以保留在线日记为目的，而另一些则因巨大的盈利潜力而发布。
Keeping a game rewarding for a long period of time is more than just adding some replay incentives or ability.
如果希望游戏可长时间盈利不仅仅要加入可鼓励重玩的元素或者功能。
The truth is that, one, workers have been mobile for some time; and, two, telephone wires are not the only thing keeping workers at the office.
事实是，工作人员有时候可以移动了，两根电话线不再是将工作人员留在办公室里的唯一物品。
HMRC also decided to refer the start of making tax digital for some small businesses, giving extra time to get used to the digital record keeping and quarterly updating.
针对小型企业税收数字化的初始阶段，HMRC还决定给予其更多时间来实现数字化记录保存和季度更新。
I moved away, cogitating and at the same time keeping an eye out for chance passenger in his right mind that might come along and give me some light.
我走开了，一边深思默想，一边儿还老留着神，看路上会不会碰巧过来一个不疯的人，可以给我指示愚迷。
I moved away, cogitating and at the same time keeping an eye out for chance passenger in his right mind that might come along and give me some light.
我走开了，一边深思默想，一边儿还老留着神，看路上会不会碰巧过来一个不疯的人，可以给我指示愚迷。
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