The first one that I will mention is actually something you thought maybe you could do with a single integral, but it is useful very often to do it as a double integral.
第一点就是，有些你以为是用一重积分来做的，但却通常是用二重积分来完成的。
Reasons for hospital teaching range from preventing a child falling behind and maintaining the habit of school to keeping a child occupied, and the latter is often all the teacher can do.
医院教学的原因从防止孩子落后和保持学校的习惯到让孩子被占着，而后者往往是老师所能做的事情。
Harford argues that inevitable distractions often tender the daily to-do list ineffective, while leaving room for improvisation in such a list can reap the best results.
哈福德认为，一些不可避免的干扰往往会让日常待办事项列表变得没有效率，而在这样的列表中留出即兴发挥的空间可以收获最佳效果。
In contrast, the lives of girls in well-to-do families were often very sheltered.
相比之下，富裕家庭的女孩子们通常都过着养尊处优的生活。
One of the things that businesses and indeed Government organizations often fail to do is to really see what is happening from the consumer's perspective.
企业和政府机构经常做不到的一件事就是真正从消费者的角度去看待正在发生的事情。
Today, even writers who are fairly well-known often have to do other work to supplement their writing income.
今天，即使是相当有名的作家，也往往不得不做其他工作来补贴写作收入。
Such dimensions of reading suggest—as others introduced later in the book will also do—that we bring an implicit (often unacknowledged) agenda to any act of reading.
这些层面的阅读表明——其他将在书中稍后提及的也表明——我们将一种潜在（通常意识不到）的进程表带入到了阅读活动中。
Brothers and sisters are often willing to help, but they may not know what to do.
兄弟姐妹们往往愿意帮忙，但他们可能不知道该做什么。
People are often hesitant to terminate a project when they've already invested time or resources into it, even if it might make logical sense to do so.
当人们已经在项目上投入了时间或资源时，他们常常会犹豫是否要终止项目，即使这样做是合乎逻辑的。
That does not mean teens need to use electronic devices as often as they do now.
这不是说青少年需要像他们现在这样频繁地使用电子设备。
Normally sensible IT professionals often do not believe that the "laws of software physics" apply to the deployment of new software development tools.
正常而明智的信息技术专业人员经常不相信“软件物理学法则”适用于新的软件开发工具的部署。
AT&T is often given as the gold standard of a company who decided to do a massive reskilling program rather than go with a fire and hire strategy.
美国电话电报公司经常被作为一个公司的黄金标准，该公司决定进行大规模的再培训计划，而不是采取裁员和再雇佣的策略。
In our daily life, robots are often found to do work that is too dangerous, boring, difficult, or dirty.
在我们的日常生活中，机器人经常做太危险、无聊、困难、或脏的工作。
Very often, we do not completely outgrow that infantile notion that our wishes cause things to happen.
我们的愿望导致事情发生这样幼稚的想法，我们很多时候并没有成熟到能够摆脱。
Women want to be able to do it all—volunteer for school parties or cook delicious meals—and so their answer to any request is often "Yes, I can".
女性希望自己能做到像在学校聚会当志愿者、或是自告奋勇做可口的饭菜这样诸如此类的事，因此，她们对任何请求的回答通常都是“没问题，我可以”。
According to T.P, a professor of psychology at Carlton University in Ottawa, people often draw up a "to-do" list.
据T.P，渥太华卡尔顿大学的心理学教授说，人们经常会列出一张“待办事项”清单。
All too often breaches are caused by simple blunders, such as failing to separate systems containing sensitive data from those that do not need access to them.
很多情况下，破坏是由简单的失误造成的，比如未能将包含敏感数据的系统与不需要访问这些数据的系统分离开来。
When you have strong muscles, you can do whatever you want to do! When do people often feel happier about their bodies according to the passage?
当你有强壮的肌肉时，你可以做任何你想做的事情！根据这篇文章，人们什么时候对自己的身体感觉更快乐？
In order not to make them lose trust in you, find some proper time to tell them what you really often do and like to do.
为了不让他们失去对你的信任，找个适当的时间告诉他们你经常做什么以及喜欢做什么。
How often do you go to a movie?
你多久去看一次电影？
What do you often do between classes to relax yourselves?
课间你们经常做什么来放松自己？
We sometimes have chances to make happy moments in our lives, but we often find an excuse to do something else.
我们有时有机会在生活中创造快乐的时刻，但我们经常找借口去做其他的事情。
Firstly, young people from villages usually want to live somewhere livelier and they often move to the towns and do not return.
首先，村里的年轻人通常想住在更有活力的地方，他们常常搬到城镇，不再回来。
Do you often go to Jingyue Park, by car or by bike?
你经常去净月公园吗，开车还是骑自行车去？
You may often wonder why we students should study something that has nothing to do with our own lives.
你可能常常会想，为什么我们学生要学一些与我们自己生活无关的东西。
I often read for about an hour, and then I try to think of something else to do.
我经常阅读一小时左右，然后试着想想别的事做。
He was often seen watching plants closely and thinking of ways to improve them, just as many Chinese farmers do.
人们经常看到他像许多中国农民一样，仔细观察植物，思考如何改良它们。
In Britain you may often hear "Drop in any time" or "Come to see me soon", but you can't really do that.
在英国，你可能经常听到“随时来”或“快来看我”，但实际上你不能真的这么做。
If you do it too often, you can transform in the eyes of others from a confident joker to a Chihuahua dog.
但如果你频繁这样做，在别人的眼中，你就会从一个自信的小丑变成滑稽的吉娃娃狗。
Do you find that you often miss the motivation to do constructive things that would improve your life?
你有没有发现你经常错过这样一种动机，可以让你去做能让你改善生活的有意义的事情？
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