第253句：

Since 2001, more than l,000 high school and college students in the U.S. have participated in the Body Project, which works by getting girls to undenstand how they have been buying into the notion that you have to be thin to be happy or successful.
自2001年起，美國(guó)一千多名高中和大學(xué)的學(xué)生加入了“塑身工程”，該工程旨在幫助女孩了解她們一直信奉的觀念：只有瘦才會(huì)幸福和成功。

六級(jí)詞匯講解:
該句的主干是...students...have participated in the Body Project...。which引導(dǎo)的非限制性定語(yǔ)從句修飾Body Project，該從句中by引導(dǎo)的介賓結(jié)構(gòu)作方式狀語(yǔ)，賓語(yǔ)從句how they have been buying into...successful作understand的賓語(yǔ)，that引導(dǎo)的同位語(yǔ)從句that you have to be thin...對(duì)notion進(jìn)行說明。

俚語(yǔ)buy into意為“隨大流相信；盲從”。如：
No one can buy into that brand ofliberalism.
誰(shuí)也無法認(rèn)同那種自由主義的作風(fēng)。