1.The phenomenon mainly stems from the fact that …　　2.原因accounts mainly for / are accountable for　结果　　3.原因　be responsible for 结果　　4.原因contributes partly to　结果　　5.原因　be t... 　　1.The phenomenon mainly stems from the fact that …　　2.原因accounts mainly for / are accountable for　结果　　3.原因　be responsible for 结果　　4.原因contributes partly to　结果　　5.原因　be t...