如果需要的话，你可以在跑步机上跑步。但如果可以的话，最好一个礼拜可以在户外跑一两天。
You can do these runs on a treadmill if necessary, but it would be ideal if you could run outdoors one or two days a week.
正如我在《儿女满堂的自私原因》中笑谈：“没有人要求降生，但如果可以要求的话，几乎所有人都希望这样。”
As I quip in Selfish Reasons to Have More Kids, "No one asks to be born, but almost everyone would if he could."
摇晃是用户期望启动撤消和重做的首要方法，但如果可以的话，你也可以在导航栏中包含系统提供的撤消和重做按钮。
The shake gesture is the primary way users expect to initiate undo and redo, but you can also include the system-provided Undo and Redo buttons in a navigation bar, if appropriate.
我们知道，若同样的时间可以赚10美元，我们不必在意所用时间到底值不值，但如果可以赚100美元，我们的时间成本就高了。
We accept that it’s not worth our time to worry about $10, but when it’s $100, we get cheap again.
但如果可以选择，决定拥有更多时间而非金钱——尽管普遍的倾向与之相反——的可能性是一个良好的信号，显示你会享受自己追求的幸福。
But when it is a choice, the likelihood of choosing more time over more money - despite the widespread tendency to do the opposite - is a good sign you'll enjoy the happiness you seek.
竞争可以是良性的，但如果被推向极端，就会导致恃强凌弱。
Competition can be healthy, but if it is pushed too far it can result in bullying.
如果你不喜欢它，可以，但把它说得一无是处就没什么道理了。
If you don't like it, fair enough, but that's hardly a justification to attack the whole thing.
我可以通过电话了解你的详细情况，但如果你使用网站的话就简单多了。
I could take your details over the phone, but it's much easier if you do it using the website.
说没有简单的答案听起来很明智，但实际上是愚蠢的：如果我们有清醒的理智和政治意愿来采取行动的话，我们的失业危机可以很快得到解决。
Saying that there're no easy answers sounds wise, but it's actually foolish: our unemployment crisis could be cured very quickly if we had the intellectual clarity and political will to act.
国有化的威胁可以暂时避免，但如果乘客的合理愤怒不能在短时间内得到解决，国有化的威胁将会卷土重来。
The threat of nationalization may have been seen off for now, but it will return with a vengeance if the justified anger of passengers is not addressed in short order.
但如果国会想要阻止各州使用自己的资源来检查移民身份，它可以这么做。
But if Congress wanted to prevent states from using their own resources to check immigration status, it could.
因此，自己动手做（DIY）可以给我们带来乐趣，帮助我们省钱，但如果我们不自量力，它并不总是像想象的那么容易。
Therefore, DIY can bring us fun and help us save money, but it is not always as easy as it is thought to be if we bite off more than we can chew.
如果您时间不足但资金充裕，您可以向为穷人提供帮助的非盈利组织捐赠。
If you have more money than time, it makes sense to make a donation to non-profit organizations that help poor people.
尽管步行可以作为一种独立的锻炼方法，但如果你的目标是恢复尊巴课程、打网球、骑行或其他任何运动，步行也是不错的第一步。
Although it can be a workout on its own, if your goal is to get back to Zumba classes, tennis, cycling, or any other activity, walking is also a great first step.
没有人要你放弃自己喜欢的活动，但如果在电视上看到美食节目的话，你可以试着自己做节目上的菜。
No one is asking you to give up activities you like, but if you're watching food shows on TV, try cooking instead.
她说：“如果我们的产量增加，价格下降，麦当劳就可以从中获益，但如果我们倒闭，麦当劳就不能获得任何好处了。”
"McDonald's could see a benefit if our production went up and prices went down, and no benefit if we went out of business," she says.
这可以让你自由移动，但如果你摔倒了，它会把你托起来。
This allows you to move freely, but it will hold you up if you fall.
好的友谊不容易发展，但如果你是忠诚和真诚的，友谊可以持续到永远。
Good friendships are not easy to develop, but a friendship can last forever if you are loyal and sincere.
医生称，口罩可以阻挡高达80%的病毒，但如果不勤洗手，戴口罩也没有用。
Some doctors say that masks can stop the virus as much as 80%, but if you don't wash your hands often, it's no use wearing a mask.
在中国，你18岁就可以选举和学开车，但如果你想结婚，女性得等到18岁，男性得等到22岁。
In China, you can vote and learn to drive a car when you are 18, but if you want to get married, women have to wait until they are 18 and men until they are 22.
当记者问他会不会因为去武汉导致缺很多课而伤心，他说缺的课可以以后再学，但如果祖母错过了最好的治疗时间，就没有机会挽回了。
When the reporter asked him if he felt sorry to miss so many lessons because of going to Wuhan, he said the lessons he missed could be learned later, but if his grandmother missed the best time to cure, there would be nothing to get the chance back.
许多老师说学生不应该在学校使用手机，但如果有充分的理由，学生可以把手机留在学校办公室。
Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school office.
在数学课上，如果答案小于10，他可以竖起手指，但那没什么意思。
In math class he could hold up fingers if the answer was less than 10, but that wasn't fun.
在卢旺达，一个年轻人在城市里工作一天只能赚10元（1.4美元），但如果他们根据盒马的订单种植辣椒，一天可以赚50到60元。
A young man in Rwanda will only make 10 yuan ($1.4) a day by working in the cities, but if they grow hot peppers due to Hema's orders, they can make 50 to 60 yuan a day.
我对她表示了感谢，虽然没有期待什么，但还是告诉她，我们有时会沿着这条小路遛狗，如果她发现什么可以联系我们。
I thanked her, expecting nothing, but still told her that we sometimes walked our dog along the path if she might find something.
第二阶段仍然是测试疫苗的安全性，但主要是检测疫苗是否有效。如果第二阶段进展顺利，疫苗研发就可以开始第三阶段。
Phase 2 still tests the vaccine's safety, but it's mainly a test to see if the vaccine seems to work. If Phase 2 goes well, the vaccine can begin Phase 3.
如果你想找一份不需要学位但薪水不错的工作，这里有一些工作可以考虑。
If you're in the market for a job that doesn't require a degree but does come with a nice salary, here are a few jobs to consider.
但这也是它的优势：方便读者理解，如果他们愿意的话，也可以为自己的学校算算数。
That is also its strength: it's easy for readers to understand, and to do the arithmetic for their own schools if they'd like.
但这也是它的优势：读者很容易去理解，如果他们愿意的话，也可以为自己的学校做计算题。
But that is also its strength: it's easy for readers to understand, and to do the arithmetic for their own schools if they'd like.
但这也是它的优势：读者很容易去理解，如果他们愿意的话，也可以为自己的学校做计算题。
But that is also its strength: it's easy for readers to understand, and to do the arithmetic for their own schools if they'd like.
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