If you must move, don't follow a stream unless you know it, and in that case, you are not lost.
如果你非要走动的话，别顺着溪流走，除非你对它很熟悉。但是如果你很熟悉，那你就不会迷路了。
From the profusion of electronic-text sites available, it looks as if this virtual library is here to stay unless a proposed revision to copyright law takes many publications out of the public domain.
从现有的大量电子文本网站来看，除非版权法的修订提案将许多出版物排除在公共领域之外，否则这个虚拟图书馆似乎将继续存在。
Even if true, this evidence does not refute the contention that editors should bear some of the blame for the reductions, unless editors are merely passive instruments responding to reader interest.
即使这是真的，这一证据也不能反驳编辑应该承担部分责任的论点，除非编辑只是被动地回应读者的兴趣。
A bumblebee, if dropped into an open tumbler, will be there until it dies, unless it is taken out.
如果把一只大黄蜂丢进一只敞口平底玻璃杯里，不把它拿出来，它会在那儿一直呆到死。
We will not attack unless we are attacked; if we are attacked, we will certainly counterattack.
人不犯我， 我不犯人; 人若犯我， 我必犯人。
If you wear glasses, consider taking them off at takeoff and on landing, unless they're absolutely unbreakable.
如果你戴着眼镜，考虑在起飞与着陆时取掉，除非它们绝对不易碎。
But you will never know if they work unless you study them in humans, so this is an important first step.
但是如果你不在人类身上应用这些研究你将永远不知道它们是否能获得成功，所以这是很重要的第一步。
If you think you're not worth anything unless you're part of a couple, then you won't be.
如果你以为“除非你是一对夫妇的一部分，否则就什么都不是”那么你的确什么都不是。
If you are doing God's work, there is no way you can fail unless you are not in alignment.
如果你正在做上帝的工作，那你是不会不成功的除非你不在标准内。
If consumers continue doing business online, operators surely will not close their outlets, unless the businesses fail because of poor performance.
如果消费者继续开展网上贸易，运营商也肯定不会失去顾客，除非公司本身表现不佳。
Unless you are nutritionally deficient, you probably don't need a vitamin supplement and if you do, a simple multivitamin is enough.
除非你营养不良，否则无需补充维生素。而如果你真的有需要，那么一种复合维生素就足够了。
If it becomes a petro-currency, many factories will be forced to close unless the needlessly high costs of doing business in Brazil are slashed.
如果雷亚儿变成石油货币，除非在巴西经营的无谓高商业成本被削减，很多工厂都会被迫关门的。
The study concluded that this was because people didn't go outdoors in winter unless it was absolutely necessary, and if they did, they dressed properly.
研究得出的结论是，在冬天人们除非绝对必须轻易不到户外去，如果要去的话，也须穿上合适的衣物。
You might get better quality from using digital cables if your devices support it, but unless you have a very large monitor or TV it can be hard to tell the difference.
如果你的设备是支持数字接口的，那么使用数字线缆能够使质量得到些许的提升，但是除非你使用一个非常大的显示器或者电视机，否则你根本看不出有什么明显区别。
And you're allowed to use four lettered words if you don't like it at first, unless you've given those up too.
你现在可以允许自己说脏话，如果你开始不喜欢的话，除非你也已经放弃了这些。
For example, if caching doesn't work in an application, the product might be slow but acceptable, unless of course it becomes intolerably slow.
例如，如果缓存在某个应用程序中不能正常工作，那么产品有可能会变慢，但一般来讲这是可接受的，除非慢得让人无法容忍。
I think unless people can't afford, most will always choose foreign brands, if not buying overseas.
我认为，如果人们不是在海外购买，除非大家支付不起，否则大多数人将一直选择外国品牌。
Most insurers don't cover surgery to remove sagging and excess skin after weight loss, unless it is considered medically necessary - if the skin is causing rashes, for instance, or infections.
除非医学上的必要如造成红疹或者感染等，大部分的保险不包括除去减肥之后造成的松弛多余皮肤的手术费用。
Most insurers don't cover surgery to remove sagging and excess skin after weight loss, unless it is considered medically necessary — if the skin is causing rashes, for instance, or infections.
除非医学上的必要如造成红疹或者感染等，大部分的保险不包括除去减肥之后造成的松弛多余皮肤的手术费用。
Also, if you're on a roll, don't answer the phone every time it rings, unless it's your boss.
此外如果你非常忙的话，不要电话铃一响就接，除非是老板打来的。
And if that happens, potential output growth will too, unless productivity growth accelerates.
除非生产率增长加速上涨，否则情况不会改观。
Typically such transformations involve replacing “must”, “may”, “shall” or “will” and introducing “if” or “unless”. Unfortunately, transforming a requirement often results in more than one rule.
典型来说，这样的转换包含替换“必须”、“可能”、“将要”，并引入“如果”或“如果不”。
Tip: if your home is invaded, do not fight back unless your life is in danger.
小贴士：如果有人侵入你的家，除非你的生命受到威胁，不要抵抗。
Tip: if your home is invaded, do not fight back unless your life is in danger. Cooperate and remain calm.
小贴士：如果有人侵入你的家，除非你的生命受到威胁，不要抵抗。配合入侵者并保持镇静。
He doubted if this could be found unless the operator can transpose himself into the centre of gravity of the marionette.
他怀疑这个路径是否会被发现，除非操作者能够把自身直入木偶的重心。
If we simply extract the data elements, we get "0, 255, 255", which is meaningless unless you know what the data definitions are.
如果我们只抽取数据元素，会得到“0,255,255”，如果您不知道数据定义是什么，那么这种数据毫无意义。
And if a range of addresses was selected, we were out of luck unless the business was a significant place, such as a local landmark or historical site.
如果我们选择的是一个范围内的地址，那么将很难发现要找的地点，除非它是标志性建筑物或历史名胜。
And if a range of addresses was selected, we were out of luck unless the business was a significant place, such as a local landmark or historical site.
如果我们选择的是一个范围内的地址，那么将很难发现要找的地点，除非它是标志性建筑物或历史名胜。
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