Everyone benefited from limiting their intake of coffee to just one or two cups a day.
每个人都从每天限量喝一杯或两杯咖啡的做法中受益了。
This wine is from one of the two best vintages of the decade in this region.
这种葡萄酒是这一地区近十年来葡萄产量最好的两个年份之一生产的佳酿。
Given the extraordinary diversity of life on the planet, there must be mechanisms for speciation: the formation of two species from one original species.
考虑到地球上的生命的非凡多样性，一定存在着形成物种的机制：从一个原始物种演变为两个物种。
Imagine going from reading texts as short as one or two sentences to trying to read entire books written in complex language and containing sophisticated ideas.
想象一下，从阅读短至一两句话的文本，到努力去读整本用复杂的语言编写、观点晦涩难懂的书籍。
We met some nice people from Canada and spent two great days with them. One of them, Clive, is going to your university next year.
我们遇到了一些来自加拿大的好朋友，和他们一起度过了美好的两天。其中一个叫克莱夫的朋友，明年将去你的大学读书。
Now from your draft report it sounds as if you had one or two problems deciding who was going to actually appear in the video.
现在，从报告的草稿看来，您在决定谁将实际出现在视频中时似乎存在一两个疑问。
Most cells in your body have two copies of every chromosome and, therefore, two copies of every gene: one from your mother and one from your father.
你体内的大多数细胞每条染色体都有两份拷贝，因此，每个基因也都有两份拷贝：一份来自你的母亲，一份来自你的父亲。
This is closer to biology, especially with speciation, how two distinct species form from one.
它更接近生物，尤其是物种的形成，也就是一个物种如何形成两个截然不同的物种。
The two colleges have a reciprocal arrangement whereby students from one college can attend classes at the other.
两所学院有一项互惠协定，允许学生在院际间选课。
The wind dislodged one or two tiles from the roof.
大风从屋顶上刮下了一两片瓦来。
Two exclusions from one school in the same week is unusual.
一所学校在一周内就有两起开除学生的事是少有的。
People from southern China say that they always buy what they need for just one or two meals.
来自中国南方的人说，他们总是只买一两顿饭所需要的东西。
The relative amount of these two kinds of water varies greatly from one kind of rock or sediment to another, even though their porosities may be the same.
这两种水的相对含量在不同的岩石或沉积物之间差异很大，尽管它们的孔隙率可能是相同的。
On the tip of a tree which had lost all its other leaves, two still remained hanging from one twig: Ole and Trufa.
在一棵其它叶子都掉光的树顶上，还有两片挂在一根细枝上：奥立和特鲁法。
If it is cut in a plane different from the one used by the early investigators, it will not form two whole embryos.
如果在一个不同于早期研究人员所使用的平面上切割，就不会形成两个完整的胚胎。
One day, while I was waiting for my father, I saw a little boy, around two years old, running freely on the grass as his mother watched from a short distance.
一天，当我在等爸爸的时候，我看见一个大约两岁的小男孩在草地上自由地奔跑，他妈妈就在不远处看着。
From this survey, one can estimate that fewer than one in five children have some contact with a hospital teacher—and that contact may be as little as two hours a day.
从这个调查中，我们可以估计不到五分之一的孩子和医院的老师有过接触——这种接触可能每天只有两个小时。
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