If you can buy only one case at auction, it should be vintage port.
如果你在拍卖会上只能买一箱酒，那就应该是优质的波尔图葡萄酒。
The Department for Education's guidance says schools can charge only for board and lodging if the trip is part of the syllabus, and that students receiving government aid are exempt from these costs.
教育部的领导说，如果旅行是教学大纲的一部分，学校只可以收取食宿费用，而且接受政府资助的学生不需要支付这些费用。
Because warm air can hold more moisture than cool air, the relative humidity will be constant only if the amount of water vapor in the atmosphere increases as the temperature rises.
因为温暖的空气比冷空气能容纳更多的湿气，所以只有当大气中的水蒸气量随着温度的升高而增加时，相对湿度才会保持不变。
Why dose a whole field with chemicals if you can spray only where they are needed?
如果你可以只在需要的地方喷洒化学药品，为什么要在整个田地里喷洒呢？
As you only have a short stay in Shanghai, you probably will not be able to do much more sightseeing. But if I can help in any other way, please let me know.
由于您在上海只能做短暂停留，您可能无法做太多的观光。但如果我能在任何其它方面帮上您的忙，敬请告知我。
If you never record DVDs, you can save money by buying a cheaper combo drive, which plays both DVDs and CDs but records only the latter.
如果你从不刻录DVD，那么你可以省些钱买比较便宜的combo驱动器，它可以播放 DVD和CD，但是只能刻录 CD。
You might wonder how we can tell whether fossil animals lived on land or in water, especially if only fragments are found.
你可能想知道我们如何分辨化石上的动物是生活在陆地上还是水里，特别是如果只发现了化石碎片。
This cell can only be an effective barrier if there's no way to get past it.
这个细胞只有在无法通过时才能成为有效的屏障。
If we can only get to the old tannery before we break down!
要是我们能在累垮之前赶到老制革厂就好了！
If you're still skeptical about exercising, we can only ask you to trust us and give it a try.
如果你仍对锻炼持怀疑态度，我们只能请你相信我们，试一试。
Responses suggest that numeric people have some trouble keeping track of how many nuts remain in the can, even if there are only four or five in total.
回答表明，数字型的人很难记住罐头里还剩下多少坚果，即使总共只有四五个。
A club can influence people a lot even if it has only a few members, so I wouldn't worry too much about it being small.
即使一个俱乐部只有几个会员，也能对人产生很大的影响，所以我不会太担心它的规模小。
For a company in this situation, keeping up to date with the latest technology, even if it's only for the benefit of key staff, this can be hugely expensive.
对于一家处于这种情况下的公司来说，即使只是为了关键员工的利益而跟上最新的技术，也可能是非常昂贵的。
Of course, biological control agents can safely be released only if it can be verified that they feed solely on the target weed.
当然，只有能够证明它们仅以目标杂草为食，生物控制剂才能安全释放。
Note that cheques take longer to clear in France than in Britain, and can only be stopped if stolen or lost.
请注意，支票在法国清算的时间比在英国要长，而且只有在被盗或丢失时才能被停用。
Even if you are only going on a day trip to another country, accidents can happen.
即使你只是去另一个国家旅行一天，意外也会发生。
If you infer from facts, you can only draw one conclusion.
如果你根据事实推断，只能得出一个结论。
It can be difficult if the only disabled toilet in the basement is a long way from where the film is showing.
如果地下室里唯一一个残疾人厕所被安排在离放映大厅很远的地方，这样会很麻烦。
As if you needed another reason to hate the gym, it now turns out that exercise can exhaust not only your muscles, but also your eyes.
若你需要另一个讨厌健身房的理由，最近事实证明，运动不仅会使肌肉疲劳，还会让眼睛疲劳。
Only if we master those abilities can we make a successful micro blog.
我们只有掌握了这些技能，才能做出一个成功的微博号。
Money can make you happy, only if you spend it in a clever way.
只有在你聪明地花钱时，钱才会使你感到快乐。
Agrillo's team found that mosquitofish can discriminate between numbers up to 16, but only if the ratio between the fish in each shoal was greater than 2:1.
阿格利罗的团队发现，食蚊鱼最多可以分辨大到16的两个数字的大小，但前提是每个鱼群中鱼的比例大于2:1。
Dark patterns also can be addressed on a self-regulatory basis, but only if organizations hold themselves accountable, not just to legal requirements but also to industry best practices and standards.
黑暗模式也可以在自我监管的基础上得到解决，但前提是各组织要自己担负起责任，不仅要遵守法律要求，还要遵守行业最佳实践和最高标准。
Everything's got a moral, if only you can find it.
每件事都有寓意，只要你能找到。
It will be possible to create more sophisticated moral machines if only we can find a way to set out human values as clear rules.
只要我们能找到一种方法，将人类的价值观以明确的规则阐述出来，就有可能创造出更精密的符合道德标准的机器。
Honey made from such nectar can cause the effects the texts describe, but only if eaten fresh since the honey loses its toxicity within a few weeks of being made.
用这种花蜜制成的蜂蜜会产生书上所描述的效果，但只有在新鲜食用的情况下才会如此，因为蜂蜜在制作几周内就会失去毒性。
No matter what you do, you can only succeed if you love what you're doing and pay enough attention to it.
无论你做什么，只有你热爱你所做的事，并足够重视它，你才能成功。
You can learn as well as anyone, if you will only try.
只要你肯尝试，你可以学得和任何人一样好。
Only if schools, families and students join hands together, can students get enough sleep and be at their best in schoolwork.
只有学校、家庭和学生齐心协力，学生才能有充足的睡眠，在学业上发挥最佳状态。
To keep hope is the best weapon for victory, so never tell yourself "nothing" because only if you try to search, you can always find a "pear" to pull you out of trouble.
保持希望是取得胜利的最好武器，所以永远不要告诉你“什么都没有”，因为只要你努力寻找，你总能找到一个“梨”把你从困境中拉出来。
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