21.出乎意料的是在1995年，硕士毕业生的平均周收入与博士毕业生拉平：皆为185美金。
Quite unexpectedly, in 1995, the average weekly earnings of master degree graduates drew even with that of PhD graduates, both at $185.
22.虽然博士毕业生的收入在2005年的增幅有所加大，但与硕士毕业生的差距也仅仅只有15美金。
Even though the growth margin of the income of PhD graduates drew apart from that of master degree holders in 2005, the gap was merely $15.
23.所有类别的人们周收入增长最小的情况出现在1985-1995年间，最多的也仅仅增长了5美金。
The slightest increase for all the groups of people occurred during the period from 1985 to 1995, with the biggest increase by only $5.
24.出人意料的是女性吸烟者的比例在1970年达到了21%，较1960年增长了4%。
What is unexpected is that the percentage of female smokers hit 21% in 1970, an increase by 4% over 1960.
