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.
但如果不试你永远不知道。
但如果不这样的话，那么你很快就会被别人干掉。
However, if this is the case, then you will soon be rid of others.
有些人不喜欢变革，但如果不这么做的后果是灾难性的，你应当拥抱变革。
Some people don't like change, but you need to embrace change if the alternative is disaster.
我们可以办一届盛大的奥运会，但如果不采取一些措施，它或许会是一次重大的失败。
We can have a great Olympics, but if some steps aren't taken, it can be a big failure.
很多人都认为带着孩子不可能成为自行车上班族，但如果不这么想，这件事确实很简单。
Many people think it’s impossible to be a bike commuter with children, but that is simply not the case.
有一些SATA控制器允许对主机板进行扩展，但如果不事先做好准备的话，可能会带来一些麻烦。
There are some SATA controllers that allow expansion of the motherboard, but may create a bottleneck if not planned for in advance.
但如果不按照目前商定的计划行动，那么到2020年全球碳排放总量将升至650亿吨。
Emissions, in the absence of the actions so far agreed, would rise to 65 gigatonnes by 2020.
我们不可预知尚未发生的未来，但如果不胡思乱想，现实逐渐显现的峥嵘面容将令我么措手不及。
We can't know the future before it happens, but if we don't ask the question, we may be surprised when reality unfolds.
设置到IBMCloud 的VPN连接并不困难，但如果不预先计划，设置过程可能会很耗时。
Setting up a VPN connection to the IBM Cloud is not difficult, but it can be time-consuming if you don't do some up-front planning.
但如果不这么做，那些在美国的银行里有大量存款的客户可能会提走资金，将钱转到能提供更多保险的海外市场。
Yet not making such a move opens up the possibility that customers with large deposits in U.S. Banks might withdraw their funds and move them overseas to jurisdictions that offer more insurance.
在Fours quare和Gowalla这个案例中，这还算不上大问题；虽然这些服务或许有趣，但如果不参与也不会使任何人出于严重的劣势中(至少现在还没有)。
In the case of Foursquare and Gowalla, this is not much of a problem; while these services may be fun, no one is severely disadvantaged (at least not yet) by failing to participate.
他说：“找到一种促进这种转变的方式对他们来说才有意义，但如果你不继续做下去，你将会惹怒你最忠实的顾客。”
"Figuring out a way to accelerate that transition would make sense for them," he said, "but if you discontinue it, you're going to have your most loyal customers really upset with you."
但如果我不立马结束这期节目，我的制作人就得火大了。
But if I do not end this program right now, there will be fireworks from my producer.
但如果你不照顾这些植物的话，那么你就会去展示那些充满了斑点的枯萎的植物。
If you don't take care of them, however, you'll be showing off splotchy and wilted plants.
但如果贝卢斯科尼不迅速采取行动来解决意大利经济中的结构性问题，利率可能飙升，降低意大利躲过灾难性违约的几率。
But if Berlusconi doesn't move fast to address the structural problems in Italy's economy, the rate could skyrocket up, handicapping Italy's chances in avoiding a devastating default.
但如果我要呆在家里，她也要赖着不走。
But if I was going to be at home, she wanted to be at home as well.
但如果孩子不面对，自我将会削弱。
我不…，他们说得很真诚，但如果有人说，“我可以胳肢自己”，有多少人承认自己可以，胳肢自己？
And I don't — and they seemed sincere but if people say, "I can tickle myself," how many people here will own up to being able to tickle themselves?
但当我完成以后，如果这个解决方案是不美的，我知道这个方案一定是错误的。
But when I have finished, if the solution is not beautiful, I know it is wrong.
亚利桑那州马里科帕(Maricopa)县县司法长官，他受人爱戴。但如果他不遵守一项正在进行的关于对西班牙人歧视的调查，司法部威胁要起诉他。
The Justice Department threatened to Sue the popular sheriff of Maricopa County in Arizona if he did not comply with an ongoing investigation into discrimination against Hispanics.
显然，您绝不希望系统发生崩溃，但如果的确出现了这种情况，那么不希望这是由于系统管理员的疏忽造成的。
Obviously, you never want your system to crash but, if it does, you don't want it to be anything you did as the systems administrator.
利用客户信息以增加其交易优势(如果这是高盛干的事)，也许不违背法律，但这么做几乎是不知廉耻。
Using client information to increase its trading edge-if that is what Goldman does-may not be against the law, but it is hardly honourable.
如果不表达的话，那我们就不会知道失去意味着什么；我们可能知道，但如果药物治疗安抚了我们的绝望，那我们可能不能完全感受到。
It is not that we would not know what the loss meant if there was no expression; we would know, but we wouldn't feel it fully if medications soothed our despair.
她们从来不会搭陌生人的车，但如果她们不这样的话我也会提醒他们要相信自己的直觉。
They have never wanted to catch lifts with strangers, but if they did I would warn them to follow their instincts.
她会说，聪明的女孩应胸怀大志，但如果她们有了孩子，那么兼职工作甚至不工作也没什么错。
While clever girls should aim high, there is nothing wrong with them working part-time or not at all when they have children, she will say.
它具有属性，但如果尝试设置其不包含的属性，它不会引发异常，这一点与普通数据对象不同。
It has properties, but if you try to set a property of it which is does not contain, it will not throw an exception like normal data objects.
它具有属性，但如果尝试设置其不包含的属性，它不会引发异常，这一点与普通数据对象不同。
It has properties, but if you try to set a property of it which is does not contain, it will not throw an exception like normal data objects.
应用推荐