然而，我們也常常發(fā)現(xiàn)，有的主題思想并非直接由一、二個(gè)句子表述，而是在文中間接暗示著。這就需要讀者根據(jù)文中細(xì)節(jié)進(jìn)行概括與歸納，找出主題思想。例七：
It's no wonder that we have so many rejections for physical reasons in our Selective Service．Since October of 1948，some six million young men have been examined for military duty．Of these，more than a million were rejected as physically unfit for military service．To get two men today，the United States Army must call seven men．Of the five rejected three are turned down for physical reasons and two for mental problems．To get the 196thousand additional men we needed for Berlin，the government had to call up 750 thousand men．And the rejection rate is increasing each year．The reason for this problem is that we are underexercised as a nation．We look，instead of play．We ride，instead of walk．The way we live prevents us from being healthy．
本段中找不到某一句作為主題。根據(jù)文中的內(nèi)容進(jìn)行歸納，可找出主題思想，即：“The military's rejection rate for physical reason is increasing because this nation's lack of exercise is leading to poor health．”
在確定一篇文章的中心思想時(shí)，我們通常用快讀的方法，從頭至尾將全文瀏覽一遍，注意不要被個(gè)別詞、句難住而停下來。要從上下文的連貫意思上來理解全文，看看全文談?wù)摰氖鞘裁粗黝}（Subject）、作者是從哪幾個(gè)方面（Aspects）來進(jìn)行闡述的、有關(guān)這個(gè)主題我們了解了些什么。這樣，就可以比較有把握地概括出中心思想了。
It's no wonder that we have so many rejections for physical reasons in our Selective Service．Since October of 1948，some six million young men have been examined for military duty．Of these，more than a million were rejected as physically unfit for military service．To get two men today，the United States Army must call seven men．Of the five rejected three are turned down for physical reasons and two for mental problems．To get the 196thousand additional men we needed for Berlin，the government had to call up 750 thousand men．And the rejection rate is increasing each year．The reason for this problem is that we are underexercised as a nation．We look，instead of play．We ride，instead of walk．The way we live prevents us from being healthy．
本段中找不到某一句作為主題。根據(jù)文中的內(nèi)容進(jìn)行歸納，可找出主題思想，即：“The military's rejection rate for physical reason is increasing because this nation's lack of exercise is leading to poor health．”
在確定一篇文章的中心思想時(shí)，我們通常用快讀的方法，從頭至尾將全文瀏覽一遍，注意不要被個(gè)別詞、句難住而停下來。要從上下文的連貫意思上來理解全文，看看全文談?wù)摰氖鞘裁粗黝}（Subject）、作者是從哪幾個(gè)方面（Aspects）來進(jìn)行闡述的、有關(guān)這個(gè)主題我們了解了些什么。這樣，就可以比較有把握地概括出中心思想了。