But if necessary can it defend it?
如果我们必须防守，我们能否守得住？
It's safer to fit child seats in the rear of the car, but if necessary they can be fitted in the front.
因为它更适合儿童座椅在汽车的后部，但如果必要的话，他们可以在安装前。
It said the Banks should try to get the money privately but if necessary they would have to turn to public funds.
声明说，银行应努力私下筹集资金，如有必要，可求助公共资金。
The second implication is your need to focus on getting more of certain nutrients into your system, preferably with food, but if necessary, with supplements.
第二层意义便在于，(你由此可意识到)对于某些特定营养成分，你需要集中摄入更多量——最好是通过食物摄入，当然，不得已时，也可通过其他营养补剂。
I may look like a tenderfoot, but I think I can follow a trail or carry a pack if necessary.
我也许看起来像个新手，不过有必要的话我认为我也能跟着上路或扛包。
The doctors will operate if necessary—but it may not come to that.
必要时医生会施行手术，但也许还不致如此。
I don't know if that time apart was necessary for me to realize it, but I had more fun with her that week than I had in years.
我不知道那段分开的时间对我来说是否有必要让我想明白它，但那一周我与她在一起的欢乐比几年来的都多。
Adults tend to talk about learning as if it were medicine: unpleasant, but necessary and good for you.
成年人谈论学习时，往往把它当作一剂良药：令人不快，却不可或缺，且对你有益。
I was prepared to report the case to the police and prosecutors if necessary but could hardly be confident whether I would be taken seriously.
我当时准备如果有必要的话向警方和检察官报告案情，但他们会不会把我当回事我几乎是毫无把握。
This is a risky option but sometimes it is necessary – especially if most other people share the same problems with John.
这是个冒险的选择但有时很必要——特别是如果其他大多数人都和约翰有问题。
I've read that you can delay naps by an hour if necessary, but missing a nap can cause a rapid crash that takes a while to recover from.
如果有必要，你可以将打盹时间推迟一个小时，但是错过一次睡眠就会导致崩溃，并需要相当长的时间才能恢复。
Consider a realistic percentage, but be willing to negotiate, if necessary.
考虑一个实际的百分比，但是需要的话愿意协商。
But Burchard knew that divine intervention would never have been necessary if BASF's product were better designed.
但是伯查德知道，如果巴斯夫能更好地完善他们的产品，就根本不需要麻烦上帝了。
We can get you a sunrise over the sea, if necessary, but not a sunset.
需要的话，我们能为您拍到海上日出，但日落不行。
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.
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。
Sounds good, but if minimalism is asking "is this really necessary?"
这听起来不错，但是如果简约主义者问道：“这真的是必需的吗？”
Reorganize your outline if necessary, but always keep the purpose of your paper and your readers in mind.
如果需要的话，重新组织你的大纲结构，但是一定要把你最初写作的目的和你的读者放在第一位思考。
But some researchers say these bizarre inventions aren't necessary if we simply tweak general relativity itself.
可是一些研究者说，如果我们简单地加强研究广义相对论本身，这些稀奇古怪的设想似乎并不需要。
It isn't necessary to have a profile but if you do, make sure it is lively and succinct.
个人简介不是必要选项，但是你要保证它的生动简洁。
The truth is that it’s not something that’s necessary for everyone – but if it is necessary, you need to set aside a bit of time to get it done.
事实上并非每个人都需要——但如果有必要，你应该花点时间来处理下。
If setuptools is already installed on the local machine, this background step is not necessary; but if it needs to be installed manually, much of the transparency is lost.
如果setuptools早已在本地机器上安装了，那么这个后台步骤就不再需要执行；但是如果它需要手工进行安装，那么很多透明性就都丢失了。
To get full benefit from this tutorial, it is helpful but not necessary if you are familiar with these concepts and products
为了从这个教程中获得更全面的收益，如果您对以下这些概念和产品比较熟悉，那将一定会有所帮助，但这些并不是必须的
Most of the teams had compact defences and used a zonal marking policy, but could switch to man-marking if necessary.
9“大部分球队采用密集防守和区域防守战术，但是在必要时也会转变成盯人。
They provide the opportunity to confront structural problems with determination and speed, but only if we accept these actions as inevitable and necessary.
危机提供了面对结构问题的机会、决心和速度，但是只有我们认可这些行动是不可避免也是必须的，才有可能实现变革。
Then see if your solution works, but be ready to revise it if necessary.
然后看你的解决方法是否有效，但也要准备着在需要是随时改正它。
You can change the text if you really want to, but for this test, it isn't necessary.
如果确实需要，可以修改文本；但是对于这个测试，不需要修改文本。
Sure, the latter is necessary sometimes, but if you only focus on the latter, you will soon find yourself an unhappy robot, wondering whether you should have ever left the office job.
当然很多时候都是因为后者。但如果你只考虑后者，很快你就会发现，你只是一个郁郁寡欢的机器人，想着是不是本来应该辞去这份办公室工作。
Sure, the latter is necessary sometimes, but if you only focus on the latter, you will soon find yourself an unhappy robot, wondering whether you should have ever left the office job.
当然很多时候都是因为后者。但如果你只考虑后者，很快你就会发现，你只是一个郁郁寡欢的机器人，想着是不是本来应该辞去这份办公室工作。
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