1. So was born the echo-sounding apparatus, now in general use in ships.
    这样就产生了目前各种船舶上普遍应用的回声探测仪。

2. Learn young, learn fair.
    学习趁年轻，学就要学好。

3. I´ve completed a fair chunk of my article.
    我已经把文章的一大部分写完了.

4. It had been purchased by a local authority so that an enormous pie could be baked for an annual fair.
    某地方当局买下它用来焙制一个巨大的馅饼为一年一度交易会助兴。

5. It may not be fair, but many people forget the valuable services the officers perform.
    这不太公正，但很多人还是会忽略海关官员所作的宝贵贡献。