[10-20 18:18:21] 来源：http://www.67xuexi.com 高二英语教案 阅读：850次
Aims:
1. Enable the Ss to grasp the words of cloning.
Get the Ss to master some useful expressions.
Contents:
1. differ v.
1) “To be dissimilar or unlike in nature, quality, amount, or form”
eg：Ambition differs from greed.
2) “To be of a different opinion; disagree”
eg：The critic differed with the author on several facts.
2. exact adj. “Strictly and completely in accord with fact; not deviating from truth or reality”
eg：an exact account; an exact replica; your exact words.
3. commercial adj. 1) “Of or relating to commerce” 2) “Engaged in commerce’
eg：a commercial loan; a commercial attaché; a commercial trucker.
4. straightforward adj. 1) “honest’ 2) “easy to understand”
eg: a ~ explanation; written in ~ language; a ~ problem in algebra
5. procedure n.
1) ‘A manner of proceeding; a way of performing or effecting something’
eg：complained to the manager, and by this procedure got the money back.
2) “A series of steps taken to accomplish an end”
6. undertake v.
1) “To take upon oneself; decide or agree to do”
eg：undertake a task.
2) “To pledge or commit (oneself) to’
eg：undertake oneself to care for an elderly relative.
7. breakthrough n.
1) “An act of overcoming or penetrating an obstacle or restriction.”
2) ‘A military offensive that penetrates an enemy's lines of defense’
eg: a ~ in cancer research
8. disturb v. “break the quiet, calm and peace’