1. If he, or someone like him, were alive today, he might be able to tell us what to expect in the next fifty years.
    如果他或是像他的什么人今天还活着的话，他大概可以告诉我们下一个50年后会发生什么事情。

2. For most of them, fifty pence is a small price to pay for a nice big bar of chocolate.
    对大部分孩子来说，用50便士来买一大块好的巧克力，是算不了什么的。

3. Fifty million years later, both birds and mammals were well established.
    5,000万年后，鸟和哺乳动物都有了稳固的形态。