ad. 按自然规律, 完全地, 实际上, 真正地, 身体上地

chemistry/chemist/chemical/physics/physical/physician/physically
记忆：
1. chemist n. 化学家, 药剂师 Do you know the chemist coming to our college? 你认识到我们学校来的那位化学家吗？
2. chemistry n. 化学 Chemistry is a fanscinating course. 化学是门迷人的学科。
3. chemical adj. 化学的 n. 化学药品 The factory must deal with the chemicals carefully. 工厂要小心处理其化学药品。
4. physics n. 物理学 Newton made greatest contributions to classical physics. 牛顿对经典物理学做出了突出的贡献。
5. physical adj. 物理的，体力的 Steaming is a physical change. 蒸发是一种物理变化。
6. physically adv.身体上地 I’m afraid you are not physically fit for the job. 我担心你身体不适合做那项工作。
7. 后缀-an表示“人”，physician n. 医师, 内科医师 If you feel something wrong with you lung, you may go to his father, a famous physician in the hospital.如果你感到肺上有些不舒服，你就到他父亲那儿去吧，他父亲是医院里的著名内科医师。
另类阅读：
Science students have to study chemistry and physics. They must know chemical changes from physical ones, but they are not necessarily to be chemists or physicians. Some of them are not physically strong, either.