The earnings of the average American have failed to keep pace with the rate of inflation.
一般美国人的收入跟不上通货膨胀的速度。
It is difficult to keep up with the rapid pace of change.
跟上迅速的变化是很困难的。
They say a majority of people are afraid of being thrown out of their homes because rents are rising and they do not have the money to keep pace with this.
VOA: standard.2009.09.20
And you might have kind of been projecting ahead and thinking if we keep up at this pace, pretty much we would only get to carbon by the end of the semester.
你们可能会有这种推测:,如果我们以这个速度继续下去的话,这个学期,也只能讲到碳原子。
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