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1·When his cows calve each year he keeps one or two calves for his family.

每年他的母牛产犊时，他都为家里留下一两头。《柯林斯英汉双解大词典》

2·For (the sake of) convenience , the two groups have been treated as one in this report.

为方便起见，这两个组在本报告中被视为一组。《牛津词典》

3·I'll say 'One, two, three, go!' as a signal for you to start.

我喊“一、二、三，开始！”作为你开始的信号。《牛津词典》

4·How much should one member and two non members pay for the program?

一个会员和两个非会员应该为这个计划支付多少钱？

5·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。

6·One January, I had to officiate at two funerals on successive days for two elderly women in my community.

在某个1月，我不得不连续两天为我们社区的两名老年妇女主持两场葬礼。

7·She'd been working in Manchester for two years, and no one—not one of her colleagues—had ever invited her to their home.

她在曼彻斯特工作了两年，而没有人——没有一个同事——邀请过她去他们家。

8·For a time the two trains ran parallel, now one gaining a little, now the other.

有一段时间，两列火车平行行驶，有时一列火车稍微靠前，有时则是另一列。

9·Even though one or two degree Celsius rise in sea surface temperature for a relatively short amount of time can cause bleaching.

即使海面温度在短时间内升高一到两摄氏度，也可能会引起褪色。

10·It took me nearly two months to form and dry two ugly pots one for rice and one for wheat.

我花了将近两个月的时间来制作和烘干两个难看的锅，一个装稻子，一个装小麦。