Nowadays/In recent years/In modern society, 描述問題 ，which has/have been brought into focus/has/have aroused great concern .

　　The reasons for this phenomenon are varied. Among all these reasons, 原因一plays/play a critical role. Moreover/Furthermore/What s more,原因二. Besides,原因三.(產生這種現象的緣由)

　　In view of the seriousness of the problem, effective measures must be taken before things get worse. /Considering the seriousness of the problem, it is an urgent thing or us to take effective measures to解決該問題. Firstly/First of all,方法一. Secondly/Moreover,方法二. Thirdly/Besides/In addition,方法三. Only through these ways/Only in this way XXXX