考研英语是一门需要长时间积累的学科，对于备战2015考研的学子们来说，从现阶段到6月份为夯实基础阶段，在此阶段，同学们应该主攻单词和语法，坚持每天1-2篇的英语阅读以此来培养语感。

　　Why human became naked apes is still a mystery. Explanations range from ease of heat loss to the selection of mates by the quality of their skin. Dr Greaves's study, though, removes any doubt about why a change of skin color was essential.

　　词汇突破：
Homo sapiens 现代人
　　Apes 猿
　　range from…to … 包括…和…
　　though: 两个, ,隔开的though=however
　　remove ：
1.Why human became naked apes is still a mystery.
　　为什么人会变成“裸猿”还依旧是个迷。
　　2. Explanations range from ease of heat loss to the selection of mates by the quality of their skin.
　　主干：Explanations range from A to B.
　　A= ease of heat loss
　　B= the selection of mates by the quality of their skin.
　　解释包括，易于散热以及可以通过皮肤的质量来选择配偶。
　　Dr Greaves's study, though, removes any doubt about why a change of skin color was essential.
　　但是Greaves博士的研究已经使我们不再怀疑，为什么肤色的变化是有必要的。