out of my line meaning in Chinese

出乎我的能力范围
外行

" i would offer myself as your surety and friendly adviser , " said monte cristo , " did i not possess a moral distrust of my best friends , and a sort of inclination to lead others to doubt them too ; therefore , in departing from this rule , i should as the actors say be playing a part quite out of my line , and should , therefore , run the risk of being hissed , which would be an act of folly .
“我本来可以提出来作您的担保人和可靠的顾问， ”基督山说， “但我生性对我最好的朋友也有怀疑的态度，而且很愿意使他们对我也有这种态度，所以，要是背离了这条规则，我就等于在扮演外行角色，很有被嘲笑的危险，那未免就太傻了。 ”