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问题: 问几个英语词义

我在读VOA的时候碰到了几个问题,请高手指教一下。
1 BY SOME PIONT NEXT YEAR,MORE THAN HALF OF ALL PEOPLE WILL LIVE IN CITIES,FOR THE FIRST TIME IN HISTORY。句中的BY SOME PIONT NEXT YEAR是怎么回事,什么意思啊?
2 POLICYMAKERS ,SHE SAYS ,NEED TO INCREASE INVESTMENTS IN EDUCATION, HEALTH CARE AND OTHER AREAS。句中POLICYMAKERS是什么意思啊??我在字典上没找到这个词,可能是我的字典太破了。
3 For example ,it says Freetown,Sierra Leone ,has established farming within the city limits to meet much of its growing food demands.这话是什么意思啊?within the city limits 是个词组吗??

解答:

1.到明年的某个时候
2.policymakers:政策制定者
3.within the city limits:不是词组,意思是:在城市极限允许范围之内