托福閱讀長難句100句：蓄水層

　　Estimates indicate that the aquifer contains enough water to fill Lake Huron, but unfortunately, under the semiarid climatic conditions that presently exist in the region, rates of addition to the aquifer are minimal, amounting to about half a centimeter a year. (41, TPO3)

　　aquifer /'ækw?f?/ n. 含水土層

　　semiarid /?sem(a)?'ær?d/ adj. 半干旱的

　　我是分解線，大家先自己分析哦

　　Estimates indicate (that the aquifer contains enough water to fill Lake Huron), but unfortunately, (under the semiarid climatic conditions) (that presently exist in the region), rates of addition to the aquifer are minimal, (amounting to about half a centimeter a year. )

　　分析：

　　修飾一：(under the semiarid climatic conditions)，介詞短語，修飾后面紅色主干部分

　　中文：在半干旱氣候條件下

　　修飾二：(that presently exist in the region)，從句，修飾conditions

　　中文：現(xiàn)在存在于這個地區(qū)

　　修飾三：(amounting to about half a centimeter a year. ) ，非謂語動詞，修飾前面紅色主干

　　中文：總計大約一年50毫米

　　主干：rates ofaddition to the aquifer are minimal

　　中文：蓄水層的補水率很小

　　參考翻譯：

　　估計表明：蓄水層包含充足的水去填滿Huron湖。但很不幸，在目前這個地區(qū)半干旱氣候條件下，蓄水層的補水率很小，總計大約一年50毫米。

　　這個句子的主要修飾成分就是介詞短語、從句、非謂語動詞，大家務必想清楚，每一個修飾成分修飾的是什么，才能看清楚這個句子的結構。