概要写作要求用60词左右概括一篇350词左右的文章，因此需要对冗杂的信息进行简化和合并，以达到概括的目的。简化和合并信息可以采用下列几种技巧：
1．删除细节：剔除细节信息，只保留主干内容。
In addition, if the school buys automatic hand dryers, we can save money.There is a terrible waste of paper towels in the restrooms.
→Additionally, it can help the school save money.
2．简化描述：把长段的描述变成短小、简单的句子。如果材料中描述某人或某事用了好几个句子，那么你只要把它们变成一两句即可。
There were 30 cows on the farm that his grandmother had to milk every day.It was hard work for his grandmother.
→His grandmother worked hard milking 30 cows daily.
3．避免重复：在原文中，为了强调某个主题，可能会重复，应该删除或者合并这些重复信息。
They were waiting for the meeting to begin.They talked with each other.They talked about the women's football team.The team had won victories in Guangzhou.
→While waiting for the meeting to begin, they talked about the victories won by the women's football team in Guangzhou.
4．压缩长句：有些句子比较冗长，可以进行压缩和简化，使之简洁。
His courage in battle might without exaggeration be called lionlike.
→He was very brave in battle.
