托福閱讀長難句100句:成功的移居

　　Successin 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)

　　大家自己先讀，不回讀，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)

　　托福閱讀長難句分析：

　　這個句子的主干就是：

　　Success in colonization depends (to a great extent) on there being a site (available for colonization)

　　注意depend on被短語to a great extent(很大程度)隔開了，斷句不要出現(xiàn)問題，后面還有一個放在后面的形容詞短語(available for colonization)修飾a site

　　修飾一：(a safe site) ，同位語，解說說明前面的a site

　　中文：一個安全的地點

　　修飾二：(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) ，從句

　　這個從句有點復(fù)雜：

　　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)，介詞修飾放在后面disturbance

　　注意這里有一個并列結(jié)構(gòu)，either or

　　either removed competing species

　　or reduced levels of competition and other negative interactions to a level

　　中文：在那里由于焚燒或伐木要么移除了競爭物種，要么減低了競爭水平和其它負(fù)面的物種間相互影響的水平

　　修飾三：(at which the invading species can become established.) ，從句

　　中文：入侵物種能夠定居下來。

　　托福閱讀長難句參考翻譯：

　　成功的移居很大程度上依賴于有一個可用的移居的地點，即一個安全的地點，在那里由于焚燒或伐木要么移除了競爭物種，要么把物種間的競爭和其他負(fù)面的物種間相互影響減少到讓入侵物種能夠定居下來。

　　這個句子的主要修飾成分就是從句、同位語，大家務(wù)必想清楚，每一個修飾成分修飾的是什么，才能看清楚這個句子的結(jié)構(gòu)。