上亿的中国网民必须在中国互联网的最流行的聊天软件和最热卖的杀毒软件之间二选其一。
Hundreds of millions of Internet users must choose between China's top Internet chat programme and its best selling Internet security tool.
当然，那是在只有这两种选择的情况下，你不得不二选其一。
传统的思维观念告诉你你只能在刻苦族和懒人族之间任选其一，然后你就选了，那么你就变成那两种了。
Conventional wisdom says you have to choose between being a grind and a slacker. And that's that.
要减肥还是吃巧克力，你得选其一，这可是个鱼与熊掌的问题。
You'll have to decide whether you want to lose weight or eat chocolates and you can't have it both ways!
由于这个非常的原因，阴谋团体的成员正企图上演某种类型的暴行转变的游戏，大概会在美国和欧洲选其一。
For that very reason the cabalists are attempting to stage some sort of game changing atrocity, probably in either the US or Europe.
因为你可以选其一进行编写一个，有些时候你不进行报错，你很可能就获得错误的答案。
Because you can write either, and sometimes you won't get an error message, you'll just get the wrong answer.
传统和现代是水火不容的。人们必须二选其一。
Tradition and modernization are imcompatible. One must choose between them.
传统和现代是水火不容的。人们必须二选其一。
Tradition and modernization are imcompatible. One must choose between them.
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