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。
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。
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。
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？
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。
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。
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。
For most events, tickets cost one, two or three yuan.
对于多数比赛项目而言，门票要1元、2元或3元。
There will be two ballot boxes—one for yesses and one for noes.
将设两个投票箱—一个放赞成票，一个放反对票。
I'll swap these two bottles for that one.
我要拿这两瓶换那一瓶。
Intruders might invade your systems for one of two reasons: to gain access to information that they should not have or to alter the behavior of a system.
入侵者入侵您的系统可能是出于这两个原因之一：为了获取他们本不应该拥有的信息，或者为了改变系统的行为。
They housed eight adult rats with two types of robotic rat—one social and one asocial—for four days.
他们将8只成年老鼠和2种机器老鼠（一种是社会性的，一种是非社会性的）一起饲养了4天。
I'll tell you one or two of my little adventures, Mole, and you shall judge for yourself!
莫尔，我给你讲一两件我小小的冒险经历，你自己来判断吧！
He has downloaded seven news apps, through which he reads for one or two hours a day.
他下载了七个新闻的应用程序，每天通过这些程序阅读一到两个小时。
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。
What's more, if you don't remember the next word or line, pause for one or two seconds to look at your note card.
更重要的是，如果你不记得下一个单词或句子，暂停一两秒钟看看你的笔记卡。
A wind farm proposed for one of the two counties should be built in County Y rather than in County X.
在两者进行选择时，应该在Y县而不是 X县建立风电场。
A person needs two mono fins, one for each foot.
一个人需要两个单鳍，每只脚一个。
As I take my gloves off and reach for my phone, I think, "It can't be that tough to make headphones with two plugs, one for music and one for your cell phone.
当我脱下手套并拿起我的手机时，我想，“做一个有两个插头的耳机，一个用于音乐，一个用于手机，不会那么难吧。”
He paid with a two-for-one coupon.
他用一张买二送一优惠券结账。
Her journey home first took her to Chengdu for two days and one night, she rested for a night at a hotel before spending another 14 hours on a train to Yuexi county, Liangshan.
她在回家的路上，先在成都停留了两天一夜，在一家酒店休息了一夜，然后又坐了14个小时的火车去往凉山越西县。
Her journey home first took her to Chengdu for two days and one night, she rested for a night at a hotel before spending another 14 hours on a train to Yuexi county, Liangshan.
她在回家的路上，先在成都停留了两天一夜，在一家酒店休息了一夜，然后又坐了14个小时的火车去往凉山越西县。
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