四十岁前完成

done (for)───完成（for）

done for───不中用的；疲倦不堪

gone before───居先；走在前面

gone forth───出发，向前去；发布

gone in for───参加，从事；追求；赞成

one by one───一个接一个

and so forth───等等

body forth───象征

do duty for───充当；起…的作用

The portress had "done up" his room; only she had picked out of the ashes and placed neatly on the table the two iron ends of the cudgel and the forty-sou piece which had been blackened by the fire.───不过她已从灰里拾起那根棍子的两个铁斗和那烧乌了的值四十个苏的钱，干干净净地把它们放在桌上了。

For example, he predicts that if nothing is done, global warming could cut India's food production by up to forty percent by the year twenty eighty.───比如，他预计如果人类无计可施，到2080年，由于全球变暖，印度的粮食生产将减少40%。