134. A complicating factor is that merit aid has become so popular with middle-income families, who don't qualify for need-based aid, that many have come to depend on it.
译文
一个复杂的因素是，奖学金已经受到那些不符合助学金条件的中等收入家庭的欢迎，很多人开始依赖奖学金了。
点睛
本句的主干是factor is that。句中第一个that引导的是表语从句；该表语从句中包含so...that...的句型结构，其中that引导的是结果状语从句；而两个逗号之间who所引导的是middle-income families的非限制性定语从句。
become popular with的意思是“受……的喜爱，欢迎”，也可以说be popular with。如：
This young teacher is popular with students. 这位年轻的老师很受学生的喜爱。
qualify for的意思是“有资格，有权（要求）”。如：
He doesn't qualify for unemployment benefit. 他没有资格获得失业救济金。
come to do sth.的意思是“逐渐开始做某事”。如：
They have finally come to believe that. 他们终于开始相信那件事了。
depend on的意思是“依靠，依赖”。如：
Children always depend on their parents. 孩子们总是依赖父母。
考点归纳
so...that...意为“太……以至于”，常用句型为“主语＋谓语＋so＋adj./adv.＋that从句”，以so...that...引导的结果状语从句可以转换成带不定式的简单句，即可转换为...enough to...或too...to...句型，但这种转换必须符合下列条件：
当主句和从句的主语一致，且that从句是肯定句时，可用...enough to...来替换。如：
The man is so strong that he can lift the heavy box.＝The man is strong enough to lift the heavy box. 这个人非常强壮，可以抬起很重的箱子。
当主句和从句的主语不一致，且that从句是肯定句时，可以用...enough for sb. to do sth.来替换，但须注意不定式的宾语要省略。如：
The question is so easy that I can work it out.＝The question is easy enough for me to work out. 这个问题很容易，我能解答出来。
当主句和从句的主语一致，且that从句是否定句时，可以用too...to...来替换。如：
I was so tired that I couldn't go on with the work.＝I was too tired to go on with the work. 我太累了，没法继续工作。
当主句和从句的主语不一致，且that从句是否定句时，如果要用too...to...替换so...that...，需用介词for引出动词不定式的逻辑主语，即用too...for sb. to do sth.来替换，注意不定式的宾语要省略。如：
It is so hot that we can't sleep.＝It is too hot for us to sleep. 天气太热了，我们无法入睡。
