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       In this essay，I will concentrate on/focus on/dwell on/explore the causes of this problem and find out effective solutions to it.

　　cause/factor of

　　solution/suggestion

　　contribute to

　　The rapid increase of vehicles contributes mainly to the traffic issue.

　　account for占据/解释…的原因

　　environment

　　juvenile delinquency

　　pay sufficient/adequate attention to/

　　lay emphasis on/ pay heed to

　　law/regulation

　　prohibit/forbid/ban/restrain

　　influence/affect effect

　　have negative/positive effects on

　　raise/enhance/promote the awareness of

　　crack down on/upon(对…严加处置或限制) crimes

　　join hands in doing=join hands to do

　　make joint efforts to do/

　　do one‘s utmost to do…

　　put emphasis on sth.=give priority to

　　eliminate/eradicate/get rid of illiteracy/poverty

　　solve/handle/tackle/deal with/cope with

　　explore the issue from diverse perspectives

　　effective/ efficient/ constructive countermeasure

　　city dwellers = citizens

　　college graduates

　　in the colleges = on college campuses

　　proper = appropriate

　　lack

　　He lacks experience.

　　For lack of experience， he was fired.

　　as = since = now that = in that

　　so = as such， = consequently， = as a result，

　　Every metal has its reverse.

　　pros and cons

　　advocate

　　believe = assert = argue = contend = insist = demonstrate = illustrate = hold = hold the opinion that… = be of the opinion that…

　　be popular = be pervasive = gain the popularity

　　on one hand， …… on the other hand.= for one thing， …… for another，

　　to begin with，= in the first place，= first and foremost

　　what‘s else，= what’s more，= in addition，= at the second thought，

　　last but not least，

　　frankly speaking，= generally speaking，= directly speaking，directly or indirectly，= ，one way or another，

　　I will，directly or indirectly，explore the issue.

　　hold water

　　direction = compass

　　a hard issue to solve = a hard nut to crack