During the OS wars of a generation ago, it was hard to write software for one platform, let alone two, and developers were pressured to pick either Mac or PC, and quickly.
上一代操作系统之争时，就算为一个平台写软件也不容易，更别提两个了，开发人员被逼在Mac和PC上挑一个，还得要快。
Mother pandas often let baby pandas stay alone for two days.
熊猫妈妈经常让小熊猫单独待两天。
How many of our models will last nearly 1500 years, let alone one or two versions of an application?
有多少模型能够使用近1500年，更不用说应用程序的一个或两个版本了？
How many of us spent hours weighing up the options of a two-week break in far-flung destinations in corners of Europe we'd never heard of, let alone visited?
我们当中有很多的人，为了对比前往欧洲某个闻所未闻的角落度过两个星期的假期的不同选择，而花费了大量时间。
However this two way traffic is not evenly matched, as you can find very little about China even in the school and university libraries, let alone in the book shops.
但这种双向交流并不平衡，在西方，甚至学校和图书馆都很少见到关于中国的书籍，更不要说在书店里了。
As the number of job losses and foreclosures has mounted over the past two years, some people have chosen to surrender their animals, unable to afford pet food let alone veterinary care.
随着失业和抵押品赎回权的取消在过去的两年里不断攀升，一些人决定抛弃他们的宠物，因为他们买不起宠物食品，宠物医院的服务则更是高价。
More than two-thirds of these 4 million newborns die in sub-Saharan Africa and south Asia, often in the first days of life, without a name let alone a birth certificate.
在400万新生儿死亡数字中，有超过三分之二发生在撒哈拉以南非洲和南亚，而且通常是在出生后的几天内死去，这时婴儿还没有名字，更不用说有出生证明了。
With a population of just two million, it considered itself too small to drive the economy of China's most populous province, with roughly 100 million people, let alone make a national impact.
由于郑州人口只有两百万，这么小规模的城市要带动中国人口最多（大约1亿）的河南省的经济增长确实很难，更不要说对整个国家经济产生影响。
No other country has won two European titles in a row, let alone carry off a World Cup in between, as Spain did in 2010.
没有任何一支球队曾成功蝉联欧洲杯王者之座，期间，西班牙还于2010年捧回世界杯冠军，史无前例。
He can't add two and two, let alone do fractions.
他连二加二都不会，更不用说做分数题了。
However, , just two days ago, few people believed the Chinese team would be able to defeat the Brazilians, let alone make it to the finals.
然而，就在两天前，还没几个人相信中国队能打败巴西队，更别说是打进决赛了。
He can't add two and two, let alone do fractions.
他连二加二等于几都不知，更不用说做分数了。
There is an old saying that two heads are better than one, which suggests that the majority's collective wisdom always dwarfs that of the minority, let alone any individual.
有句老话说，三个臭皮匠，胜过一个诸葛亮，这表明大多数人的集体智慧总是使少数人的智慧相形见绌，更何况平常人。
Otherwise, you'll be in survival mode, having a difficult time keeping track of anything let alone what you were discussing in Part two of your essay test.
否则，你就会进入生存模式，记什么都有困难，更不用谈在作文测试第二部分讨论的内容了。
Otherwise, you'll be in survival mode, having a difficult time keeping track of anything let alone what you were discussing in Part two of your essay test.
否则，你就会进入生存模式，记什么都有困难，更不用谈在作文测试第二部分讨论的内容了。
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