1. A friend of mine (a sales representative for a chemical company) was making twice the salary of college instructors during her first year on the job — even before she completed her two-year associate degree.
    我的一个朋友（一个化工公司的销售代理）在干这份工作的第一年所挣的钱就已是大学教师薪水的两倍了——这甚至还是在她修完2年制的准学士学位课程之前的事。

2. As a pill rather than a cream, Imedeen works from the inside out, providing the skin with nutritional and chemical support to encourage the body's own self-repairing process.
    那是一种叫做"伊美婷"的药丸，不是外搽的霜。它由内到外发挥作用，提供皮肤所需的营养和化学物质，促进人体的自体修复过程。

3. Similarly, our own present primitive chemical rockets, though good enough to orbit men,
    同样，我们目前使用的原始化学火箭，虽然把人送入轨道，

4. Perhaps most interesting, and most easily measured, is a chemical change in ground water before a quake.
    也许最有趣、也最容易测量的，是地震前地下水发生的化学变化。

5. John works for a large American chemical corporation.
    约翰为一家美国大化学公司工作.