be responsible
⇒ 谁应对这起事故负责？
Who should be held responsible for this accident?
conscientious
⇒ 他对工作很负责。
He is very conscientious about his work.
英语词典包含298861条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。