英語四級(jí)閱讀關(guān)鍵句：227. They fail to grasp that welcomi

227. They fail to grasp that welcoming foreign students to the United States has two important positive effects: first, the very best of them stay in the States and—like immigrants throughout history—strength the nation; and second, foreign students who study in the United States become ambassadors for many of its most cherished（珍視）values when they return home.

譯文

他們沒有領(lǐng)會(huì)到歡迎國(guó)際學(xué)生到美國(guó)留學(xué)有兩個(gè)非常重要的正面作用：第一，他們中最優(yōu)秀的人才會(huì)留在美國(guó)，像歷史上的移民一樣，為美國(guó)效力；第二，在美國(guó)學(xué)習(xí)的外國(guó)學(xué)生回國(guó)后會(huì)宣揚(yáng)美國(guó)人所珍視的價(jià)值觀，充當(dāng)美國(guó)的外交使節(jié)。

點(diǎn)睛

本句的主干是they fail to grasp。that引導(dǎo)的是grasp的賓語從句，該從句的主語是動(dòng)名詞短語welcoming foreign students to the United States；冒號(hào)之后的內(nèi)容是對(duì)two important positive effects的具體解說；who引導(dǎo)的who study in the United States是foreign students的定語從句，when they return home為時(shí)間狀語從句。

grasp在句中作動(dòng)詞，意為“領(lǐng)會(huì)，理解”，此外還可以表示“抓住，抓緊”。如：

Don't graspe my arm. 別抓住我的手臂。

very用于形容詞最高級(jí)之前時(shí)意為“十足，完全”，起到強(qiáng)調(diào)的作用。如：

I'll be there at five o'clock at the very latest. 我最遲5點(diǎn)鐘到那里。

cherish在句中意為“珍愛，珍視”，此外還有“抱有，懷有”之意。如：

Cherish your dreams, and they will lead to a bright future. 心懷夢(mèng)想，這些夢(mèng)想將會(huì)帶來光明的前途。

考點(diǎn)歸納

grasp作名詞也含有“抓住；理解”之意，相關(guān)的短語和表達(dá)如下：

have a good grasp of意為“深刻了解”。如：

You clearly do not have a good grasp of what the problem is. 很顯然，你對(duì)這個(gè)問題還沒很好地理解。

in the grasp of意為“在……掌握中”。如：

This area is in the grasp of an enemy. 這一地區(qū)在敵人的控制之下。

beyond one's grasp意為“力量達(dá)不到”。如：

Your plans are beyond my grasp. 你的計(jì)劃我無法辦到。

within one's grasp意為“力量達(dá)得到”。如：

The goal is within my grasp. 這個(gè)目標(biāo)是我力所能及的。