1. In traditional Chinese society, sons were important because they would take positions as head of the family and keep the family name alive.
    在传统的中国社会里，儿子很重要，因为他们将继承家长的位置并把家族的姓氏世世代代地传下去。

2. In a real sense, water keeps Earth alive.
    从真正的意思上说，是水维持着地球的生命。

3. In a time of increasing specialization, a time when 90 percent of all the scientists who have ever lived are currently alive, more than ever, we need to know what is truly important in life.
    在一个日益专业化的时代，在一个本时代所有科学家的90%现在都还健在的时代里，我们比过去任何时候更需了解什么是生活中真正重要的东西。