托福阅读不单单考验词汇量，更重要的是对长难句的理解?出国留学网托福栏目为大家整理了托福阅读长难句成功的移居，预祝每一位学员都能取得理想的成绩哦!
托福阅读长难句成功的移居
uccessin colonization depends to a great extent on there being a site available for colonization ---- a safe site where disturbance by fire or by cutting down of trees has either removed competing species or reduced levels of competition and other negative interactions to a level at which the invading species can become established. (TPO32, 54)
大家自己先读，不回读，看一遍是否能理解
Success in colonization depends to a great extent on there being a site available for colonization ---- (a safe site) (where disturbance by fire or by cutting down of trees has either removed competing species or reduced levels of competition and other negative interactions to a level) (at which the invading species can become established.)(TPO32, 54)
托福阅读长难句分析：
这个句子的主干就是：
Success in colonization depends (to a great extent) on there being a site (available for colonization)
注意depend on被短语to a great extent(很大程度)隔开了，断句不要出现问题，后面还有一个放在后面的形容词短语(available for colonization)修饰a site
修饰一：(a safe site) ，同位语，解说说明前面的a site
中文：一个安全的地点
修饰二：(where disturbance by fire or bycutting down of trees has either removed competing species or reduced levels of competition and other negative interactions to a level) ，从句
这个从句有点复杂：
where disturbance (by fire or by cutting down of trees) has either removed competing species or reduced levels of competition and other negative interactions to a level
(by fire or by cutting down oftrees)，介词修饰放在后面disturbance
注意这里有一个并列结构，either or
either removed competing species
or reduced levels of competition and other negative interactions to a level
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