double-edged
adjective uk/ˌdʌb.əlˈedʒd/ us/ˌdʌb.əlˈedʒd/
双重作用的，双刃的;利弊互现的
Something that is double-edged acts in two ways, often with one negative and one positive effect.
She paid me the double-edged compliment of saying my work was "excellent for a beginner." 她用“优秀的新手”这种毁誉参半的话来赞扬我的工作。
The government's programme to grow cash crops for export is a double-edged sword because it has created a local food shortage. 政府制定的种植经济作物以出口的计划是一把双刃剑，因为该计划造成了当地粮食短缺。
See also: two-edged (TWO MEANINGS)