power in vain meaning in Chinese

徒然的动力

And has left me , answered the nephew , bound to a system that is frightful to me , responsible for it , but powerless in it ; seeking to execute the last request of my dear mother s lips , and obey the last look of my dear mother s eyes , which implored file to have mercy and to redress ; and tortured by seeking assistance and power in vain
“还留下了我， ”侄子回答， “把我跟一个我认为可怕的制度绑在一起，要我对它负责，而我却对它无能为力。要我执行我亲爱的母亲唇边的最后要求，服从我亲爱的母亲的最后遗愿，要我怜悯，要我补救，却又让我得不到支持和力量，受到煎熬折磨。 ”