test on 在(身上做试验)
shampoo n. any of various liquid or cream preparations of soap or detergent used to wash the hair and scalp.洗发精; 洗发香波
skin n. the outside covering of the body皮肤
Leather is made from the skin of animals. 皮革是用动物的皮做的。
n. a usually thin, closely adhering outer layer 外皮;外壳
apple skin 苹果皮 banana skin 香蕉皮
drug n.[c] medicine that makes sick people well or that takes away pain 药物
An effective drug is bitter. 良药苦口。
n.[c] dangerous stuff that people eat or inject to make them sleep, or do things they usually do not do麻醉药品;成瘾性毒品 Heroin is a dangerous drug. 海洛因是一种危险的毒品。
activist n. 激进主义分子;行动主义分子
doubt n. not being sure怀疑;疑惑
If there is any doubt, you had better make certain. 如果你有什么不能肯定的,一定要弄清楚。
vt. not feel sure about something; not believe something怀疑
I doubt very much whether he is coming or not. 我很怀疑他是否来。
cruel adj. ready to give pain to others残忍的;残酷的
The cruel man was hitting the donkey. 那个残酷的人正在抽打那头驴。
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