1. While the reasons for entering the work force may vary from country to country, women everywhere are finding that to give their children an adequate life, getting a job is no longer optional.
    尽管加入工作大军的原因可能因国而异，但各地的妇女都发现，要让孩子丰衣足食，惟一的选择就是找一份工作。

2. Alfred had learned many of their ballads in his youth, and could vary his programme with acrobatic tricks and simple conjuring.
    阿尔弗德年轻时学过许多民歌，并能穿插演一些杂技和小魔术使自己的节目多样化。

3. You can vary the pressure at will.
    你可以随意变化压力。

4. Social customs vary greatly from country to country.
    各国的风俗习惯大不相同.

5. It stands as the most extensive survey to date on how humans vary at the level of their genes. The book's firm conclusion:
    它对人类在基因层面上的差异作了迄今为止最为广泛的调查，得出了明确的结论：