【正文】
n the areas that retain a soil cover, the reduction of vegetation typically results in the loss of the soil’s ability to absorb substantial quantities of water. The impact of raindrops on the loose soil tends to transfer fine clay particles into the tiniest soil spaces, sealing them and producing a surface that allows very little water penetration. Water absorption is greatly reduced。 consequently runoff is increased, resulting in accelerated erosion rates. The gradual drying of the soil caused by its diminished ability to absorb water results in the further loss of vegetation, so that a cycle of progressive surface deterioration is established. 這是一個非常漂亮的因果鏈論證觀點的段落,值得背誦,它的邏輯關(guān)系如下。P: 即使在有土壤覆蓋的地方,植被減少也會導(dǎo)致土壤吸水能力下降。為什么呢?雨水打在松散的土壤上移走密封小粘土顆粒(粘土可以大量吸水)產(chǎn)生一個不能讓水進(jìn)入的表面結(jié)果是流出的水變多進(jìn)一步導(dǎo)致土壤被水侵蝕;同時土地吸水能力不足土地干旱進(jìn)一步導(dǎo)致植被減少惡性循環(huán)。例子二In some regions, the increase in desert areas is occurring largely as the result of a trend toward drier climatic conditions. Continued gradual global warming has produced an increase in aridity for some areas over the past few thousand years. The process may be accelerated in subsequent decades if global warming resulting from air pollution seriously increases. 這一段還是介紹沙漠化的原因,這里講的原因是天氣干旱。如何論證??諝馕廴緦?dǎo)致全球變暖produce (隱形結(jié)果詞) aridity (dryness)沙漠區(qū)域增加其他信號詞總結(jié): 表原因的詞Because, for this reason, since, cause, on account of, why, due to 表結(jié)果的詞語As a result, in effect, therefore, consequently, results in, thus, hence, the oute is 總結(jié) 以上是托福閱讀文章主要的一些段落組織方式。把握好這個基本框架,可以幫助各位更快的確定這一段的主要內(nèi)容,更為重要的是把握以后自己寫作的段落論證方式。 Today American Gothic pervades our popular culture. On dental hygiene posters the man holds a toothbrush instead of his pitchfork, urging us to brush our teeth. In short, American Gothic has bee an infinitely variable mirror in which Americans can see themselves. 寧可累死在路上,也不能閑死在家里!寧可去碰壁,也不能面壁。是狼就要練好牙,是羊就要練好腿。什么是奮斗?奮斗就是每天很難,可一年一年卻越來越容易。不奮斗就是每天都很容易,可一年一年越來越難。能干的人,不在情緒上計較,只在做事上認(rèn)真;無能的人!不在做事上認(rèn)真,只在情緒上計較。拼一個春夏秋冬!贏一個無悔人生!早安!—————獻(xiàn)給所有努力的人.學(xué)習(xí)