quick off the mark
⇒ 幸亏他手疾眼快,一下子拔掉了电源。
Luckily he was quick off the mark, and took the plug out of the socket at once.
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。