disadvantage n. 不利，不利条件；

　　E.g. Depression is the third thing that works to my patients' disadvantage.

　　抑郁是威胁我的病人健康的第三大杀手。

　　disappear. v. 消失

　　E.g. He saw something dark disappear behind the curtain of leaves.

　　他看到一个黑漆漆的东西从浓密的树叶后消失了。

　　disconnect. v. 分离

　　E.g. You should disconnect the wireless set before you make adjustments inside it.

　　你应先拔掉无线电插头,再做内部调整。

　　7.di-,dif-, dis-： away，negative否定，分开，不

　　distrust. v. 不信任, 怀疑

　　E.g. What he saw there left him with a profound distrust of all political authority.

　　他在那儿的所见让他对一切政治当局产生了一种深深的不信任感。

　　disassemble v. 拆开

　　E.g. We had to completely disassemble the engine to find the problem.

　　我们只好把发动机全部拆开以寻找故障原因。

　　differentiate v. 区分

　　E.g. A child may not differentiate between his imagination and the real world.

　　儿童可能无法将自己的幻想与真实世界区分开来。