matter
⇒ 他出席不了会议不碍事。
It didn't matter that he couldn't attend the meeting.
serious
⇒ 他的病不碍事。
His illness isn't serious.
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。