新東方一對一托福培訓(xùn)

　Perhapsthe fact many of these first studies considered only algae of a size that couldbe collected in a net, a practice that overlooked the smaller phytoplanktonthat we now know grazers are most likely to feed on, led to a de-emphasis ofthe role of grazers in subsequent research. 　　這個(gè)句子謂語動(dòng)詞的識(shí)別稍有難度。 　　1. the fact 后描述的部分是這個(gè)fact的具體內(nèi)容，所以the fact后為同位語從句; 　　2. a practice ...to feed on 作同位語。only algae of a size后出現(xiàn)的that could be collected ina net 對前者解釋說明作用，為典型的后者定語從句; 　　3. 類似的that overlooked the smallerphytoplankton that we now know grazers are most likely to feed on 修飾說明a practice, 即為后者的后者定語從句。其中 that we now know grazersare most likely to feed on 為the smaller phytoplankton 的后者定語從句。仔細(xì)分析，we now know 類似插入語，如果在之前加as則更像比較狀語從句。當(dāng)然這個(gè)定語從句也可以寫成 on which we now knowgrazers are most likely to feed; 　　4. led to 為整句謂語動(dòng)詞，于是 a de-emphasis 為整句賓語。 　　整句主干很簡單，即Perhaps the fact let to a de-emphasis.但主語后跟了自帶一個(gè)小級(jí)別定語從句的后置定語從句，接著又跟了個(gè)自帶一個(gè)后置定語從句(同樣嵌套了自己的定語從句)的同位語，讀句子過程中，我們的思路容易被這些非主干成分打斷。