More formally, sets contain no pair of elements e1 and e2 such that e1.equals (e2), and at most one null element.
更准确地说，set不包含成对的e1和e2元素，因此如果e1 .equals (e2)，那么最多包含一个null元素。
I have a good pair of skates, but no matter how tightly I lace them, my ankles wobble.
我有一双很好的溜冰鞋，但是无论我把鞋带系得多么紧，我的脚踝还是在里面晃荡。
Thankfully, no one was privy to my intense internal debates about whether to include hand cream, or an extra pair of socks; they would have thought I’d lost my mind!
幸好，没有人知道我内心激烈的天人交战，纠结于带护手霜还是带一双备用的袜子；否则别人可能会认为我已经神志不清了。
If the person is the pair and the pair no longer exists, the person no longer exists.
如果人是一副的，并且这一副不再存在，那这个人也不复存在。
Should I put an extra pair of electrons here, does anyone think? No.
我是不是应该在这里再放一对电子呢，有人认为应该吗？不应该。
It is 7.30am and I am hovering over my dressing table, measuring my earrings to find a pair that are no bigger than a 50p piece.
早上7点30分，我开始我的梳妆台上摸索，比较着我的耳环，企图找到一对大小不超过50便士硬币的耳环。
Any weapons in the Spiderhead? No, just Abnesti's birthday mug, a pair of running shoes, a roll of breath mints, his remote.
“蜘蛛头”里有没有什么武器？没有。只有艾博的生日纪念杯，一双跑鞋，一卷薄荷糖，还有他的遥控器。
No, just Abnesti's birthday mug, a pair of running shoes, a roll of breath mints, his remote.
没有。只有艾博的生日纪念杯，一双跑鞋，一卷薄荷糖，还有他的遥控器。
Sixteen centuries later Shakespeare proclaimed: "No grave upon the earth shall clip in it / a pair so famous.
十六个世纪之后的莎士比亚感叹道：“世界上再也不会有第二座坟墓怀抱着一对如此出名的情侣。”
The first empty pair of parentheses denotes that I want to call the method named effectFinished() that takes no arguments.
第一对空的括号指明将调用不带参数的effectFinished()方法。
Unfortunately, when you use the new-style for loop, there's no way to access the actual iterator and hence no way to retrieve the second value of each pair.
不幸的是，在使用新型for循环时，无法访问实际的迭代器，因而无法获取每一对的第二个值。
In some companies and on some projects pair programming will increase productivity. While on other projects there will be no benefits or even degradation.
在一些公司某些项目中结对编程会增加产出率，但是在其他项目中却没有受益甚至有反作用。
With nanopores, however, virtually no chemical pre-processing is required and no amplification. Instead a single strand of DNA can be read, one base pair at a time, and without the need for labelling.
但是如果用纳米孔，实质上就不需要化学与处理和“放大”，取而代之的是，可以一次一个碱基对地读出单条dna链，也不用标记。
Kostya no longer resisted this; he had learned that it was best simply to return the item-a blouse, a pair of earrings, a lipstick-as soon as possible.
克斯特亚对此已经不再抱怨，他知道最简单地就是把东西尽快送还给她——不是一件上衣，就是一对耳环，或者一只口红。
One of these designs has a pair of jet engines mounted aft, but positioned over and above the wing. This aircraft has no tail fins at all (see below).
其中一个设计方案有一对安装在尾部、在机翼上方的发动机，而根本没有尾翼（见下图）。
But on Friday, the pair announced they were no longer together.
不过在周五，这对夫妻宣布他们劳燕分飞了。
You can pick a No. 3 thumb from five possible options, say, and pair it with a No. 2 medial wrist and a No. 4 lateral wrist.
比方说，你可以从五个可能的选项中选择一个3号大拇指，然后将其与2号内侧腕关节和4号外侧腕关节配对。
Buy some fold-up flatties (jewelled, preferably) that can slip into a bag so that you have no excuse not to wear a pair of heels now and again.
买几双能放进包里的折叠平底鞋(最好是宝石的)，这样你就没有理由天天穿着一双高跟鞋了。
Currently, there is no standard service for returning a pair of queue addresses, so the consumer must just know the addresses.
目前，没有用于返回队列地址对的标准服务，所以使用者必须确切地知道这些地址。
These charts use the same vertical scale as the previous pair to simplify comparisons, but differ in that there's no equivalent to the SAX2 parser figure.
这些图表使用的纵坐标与前两幅图表相同，以使比较变得简化，但是区别在于没有与 SAX2解析器数字相对应的数字。
These charts use the same vertical scale as the previous pair to simplify comparisons, but differ in that there's no equivalent to the SAX2 parser figure.
这些图表使用的纵坐标与前两幅图表相同，以使比较变得简化，但是区别在于没有与SAX2解析器数字相对应的数字。
If she did, she believed, it would be no time before the pair would be wriggling their way into court functions.
如果她有的话，她认为在这对夫妻愿意履行皇室职能之前也没有时间。
Now, we can conclude that the comfort that you get in barefoot walking cannot be obtained by wearing any pair of shoes or any other footwear no matter how well fitted they are.
现在，我们可以得出：光脚走路所带来的舒适感是任何一双鞋都无法替代的，不论这双鞋有多么的合脚。
London architect Julian Hakes has designed a pair of modern shoes with no foot plate.
一名伦敦设计师设计的，没有鞋底的现代高跟鞋。(漂亮是挺漂亮的，就是能走路吗？)
It is sweet and smooth and, at the same price as a pair of designer shoes, in no danger of giving me a hangover.
它不仅香醇软滑，价格在一对造型鞋左右，更重要的是，它没有让我宿醉。
If you have no SSH key used for a secure instance, generate a key pair before you continue.
如果没有为实例使用ssh密钥，请先生成一个密钥对，然后再继续。
No one needs a pair of binoculars to see that.
那个时候就没有人在需要用望远镜去窥探它了。
There is no stronger symbol of knowledge and wisdom than a pair of spectacles resting on the bridge of your nose.
没有比鼻梁上架上副眼镜更能显示知识与智慧了！
There is no centralized way to revoke a key once a key pair has been generated or to know exactly to whom the key has been distributed.
一旦生成密钥对，没有集中方式来撤销密钥，或确切地知道该密钥已向谁分发。
My glasses were a cheap over-the-counter pair and my hair a tangle mop, no matter what I did.
我的眼镜很普通，头发乱糟糟一团，不论我怎么梳理都弄不好。
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