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1. mutation n. 变化，突变。
如：
The mutations in plants caused by radiation have been found in experiments.
放射线引起植物变异已在实验中被证实。
Our teacher has mutation of sounds suddenly.
我们的老师突然语音发生了变化。
2. strain [strein] n. 品种，种类，类型。
如：This strain of wheat can grow during a cold spring.
这种小麦可以在寒冷的春天生长。
3. sleep deprivation
a form of psychological torture inflicted by depriving the victim of sleep
睡眠剥夺（障碍）也就是失眠，或者说是因种种原因不能达到按生理要求每个年龄段应当睡眠的时间。睡眠剥夺包括完全性睡眠剥夺、不完全性睡眠剥夺、选择性睡眠剥夺、片断化睡眠和恢复睡眠。
如：
Many studies make it clear that sleep deprivation is dangerous.
多实验都证实了睡眠剥夺的危险。
Sleep deprivation can cause stress,loss of appetite and lethargy.
睡眠不足会导致紧张、没有胃口和懒散。
4. hard-wired: 天生的，本能的。
如：
They're just not hard-wired that way.
他们天生就不擅此道。
5. hypothesis n. 假说，假设。
如：Several conclusions flow from this hypothesis.
从这项假设中可以得出几个结论。
All these fact have borne out the hypothesis.
所有这些事实证明了假设的正确性。
(可可英语版权所有,未经允许请勿转载)
