8.scarce.a.缺乏的，不足的

9.manufacturer.n.制造商

10.dissolve.v.使溶解

11gear.n.档位

12.metric.a.米制的

13.devise.v.设计，想出

14.copper.n.铜，铜色

15.criminal.n.

16.nail.n.指甲

1.pile.n.一堆

2.category.n.类别，范畴

1.The greatest prison that people live in is the fear of what other people think.

2.I can't tell you the key to success–but the key to failure is trying to please everyone.

3.When anyone has offend me,I try to raise my soul so high that the offense can't reach it.

4.When people hurt you over and over,think of them like sand paper.They may scratch and hurt you a bit,but in the end,you end up polished.