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長難句：The tropics?contain a larger surface area...

原句案例：

The tropics contain a larger surface?area of land than higher latitudes——a?fact?that?is not always?evident?when?we examine commonly used projections of Earth's curved surface, since this?tends to exaggerate the areas of land in the higher latitudes——and some bio?geographers regard the differences in diversity as are?flection of?this?effect.

詞匯講解：

tropics n.?熱帶

projection n.?發射，投射;

exaggerate /?g'z?d??re?t/ v.?夸張，夸大

結構劃分：

The tropics contain a larger surface?area of land than higher?latitudes—(afact) (that is not always evident) (when we examine commonly used projections?of Earth's curved surface), (since this tends to exaggerate the areas of land?in the higher latitudes)——and some bio?geographers?regard the differences in diversity as a reflection of this effect.

深度分析：

這個句子的主干就是一個并列結構，中間被一個破折號隔開了。

The tropics contain a larger surface?area of land than higher latitudes and some bio?geographers regard the?differences in diversity as a reflection of this effect.

修飾一：(a fact)?，同位語

中文：一個事實

修飾二：(that is not always evident)?，從句

中文：不總是那么明顯

修飾三：(when we examine commonly used projections of Earth's curved surface)?，從句

中文：當我們在仔細觀察通常所用的地球曲面投影時

修飾四：(since this tends to exaggerate the areas of land in the higher latitudes)?，從句

中文：因為這往往夸大了高緯度的土地面積

參考翻譯：

熱帶比高緯度包含更大的的土地面積——當我們在仔細觀察通常所用的地球曲面投影時，這一事實并不總是顯而易見的，因為這往往夸大了高緯度的土地面積——并且一些生物地理學家認為多樣性的差異反映了這一影響。