a demon for work
[口]精力过人的工作者, 劳动能手

a feast for the gods
n. 极精美的食物

a fine day for young ducks
n. 雨天

a penny for your thoughts
[口]你呆呆地在想什么呢

a poor risk for insurance
风险大的保险户

A growing number of people are beginning to realize that wealth is not the sole prerequisite for happiness .
越来越多的人开始意识到财富不是幸福的惟一先决条件。

A proper part-time job does not occupy students'too much time. In fact,it is unhealthy for them to spend all of time on their study.As an old saying goes:All work and no play makes Jack a dull boy.
一份适当的业余工作并不会占用学生太多的时间，事实上，把全部的时间都用到学习上并不健康，正如那句老话：只工作，不玩耍，聪明的孩子会变傻。

a run for one's money
n. 花了钱得到的一些满足, 激烈的竞争

Admittedly,ensuring sustainable development will require a certain level of sacrifice and arduous efforts on the part of all people . Nonetheless,the accrued returns will both strengthen the nation and ensure a better life for all Chinese citizens .
诚然，确保持续的发展需要人们做出一定程度的牺牲和辛勤努力。但是，积累的成果不仅能使国家更强大，而且能保证中国公民过上更美好的生活。

Although there are many companies which made huge profits investing in the Internet market, they tend to be small companies, like Yahoo, which has been basking in the limelight for quite some time.
尽管在投资网络市场中赚大钱的公司已经很多，但往往还是一些小公司。如出足风头的雅虎(Yahoo)就是一例。