VOA慢速英语:Do You Pay Full Tuition As Your Roommate Pays Less?

短语讲解：

1. At the same time, a college education is increasingly valuable.

at the same time 同时; 一起; 但是; 然而
例句：The machines all started up at the same time.
所有的机器都同时开动了。

2. When students talk about the price of college, they are usually referring to payments for tuition and fees.

refer to 参考; 指的是; 涉及
例句：Writers often refer to a dictionary.
作家时常参考字典。

3. Students are not able to directly compare the cost of schools.

be able to 能够; 能，会
例句：We study samples in order to be able to describe populations.
为了了解总体，必须研究样本。