大家好，
我是SK2的Rosa，
许多同学常常会卡在80分左右，分数无法提升，
这很可能是因为目前你区分主旨与细节的能力偏弱。
同学在念托福时，常常会遇到一个问题，不知道什么资讯该记？而什么资讯
是细节，可以不用记？
为什么你要会区分主旨与细节呢？
因为事实上托福就在考你这个能力。
试想，当你在考阅读、听力时，你只有时间读一遍、听一遍，这样的情况
下，只记主旨是最有效率的方法。反之，当你觉得每句话都重要，每句话都
想要看懂、听懂，你会很自然的需要多看几次或是多听几次才能够懂。
当你能够分辨主旨与细节时，你会发现答题率稳定很多，而且考前也不需要
做太多回考古题便能够获得高分了。
接着，我们谈谈要怎么培养这个能力呢？
其实，一边练习托福，就能够一边培养这个能力了，不需要另外找教材。
阅读：
首先，练阅读时，建议同学只读每一段的首句，写个架构式笔记。这样的练
习，能够帮助你不会读太细。
接着，检讨时，请你思考每句话的关联性、找讯号字，决定段落中哪句话是
Main、哪句话是Detail。
举例来说，以下这个段落你会怎么分析？请拿纸笔试试（或是于word档复制
贴上）。
But that is not all that changes. During all phases of sleep,
several changes in the air passages have been observed. It takes
twice as much effort to breathe during sleep because of greater
resistance to airflow in the airways and changes in the efficiency
of the muscles used for breathing. Some of the muscles that help
keep the upper airway open when breathing tend to become more
relaxed during sleep, especially during REM (the phase of sleep in
which there is rapid eye movement). Without this muscular action,
inhaling is like sucking air out of a balloon—the narrow passages
tend to collapse. Also there is a regular cycle of change in
resistance between the two sides of the nose. If something blocks
the "good" side, such as congestion from allergies or a cold, then
resistance increases dramatically. Coupled with these factors is
the loss of the complex interactions among the muscles that can
change the route of airflow from nose to mouth.
这段我会这样看：
But that is not all that changes. During all phases of sleep,
several changes in the air passages have been observed. It takes
twice as much effort to breathe during sleep because of greater
resistance to airflow in the airways and changes in the efficiency
of the muscles used for breathing. Some of the muscles that help
keep the upper airway open when breathing tend to become more
relaxed during sleep, especially during REM (the phase of sleep in
which there is rapid eye movement). Without this muscular action,
inhaling is like sucking air out of a balloon—the narrow passages
tend to collapse. Also there is a regular cycle of change in
resistance between the two sides of the nose. If something blocks
the "good" side, such as congestion from allergies or a cold, then
resistance increases dramatically. Coupled with these factors is
the loss of the complex interactions among the muscles that can
change the route of airflow from nose to mouth.
整段主旨为several changes。其他句子都在讲解哪些changes。
听力：
由于听力的一篇lecture通常有五到六个段落，练听力时，你可以拆成两次
练习。听第一次时，请先试着找出每个段落的Main idea。听第二遍时，再
试着记下最重要的detail。练了一个礼拜左右，便能够结合这两次，于第一
遍时，抓到Main跟Detail。
口说：
练口说第二到四题时，你一样也能够先把Main idea抓出来，再补上细节。
写作：
练整合写作时，有三分钟的时间读阅读。建议同学先用一分钟skim整篇文
章，抓到各段的Main idea。最后，再用剩下的时间快速读过各段的
detail。
最后，当你能够一眼区分Main idea与detail时，便能够做到时间掌控，并
且答题率稳定。
祝同学都能够考到高分！
Warm Regards,
SK2 Rosa ^______^