surprise greatly; knock someone's socks off
同义词：shock??/??stun??/??floor??/??ball over??/??blow out of the water
This is what takes him aback, to discover that he's mortal.
就是这点让他惊讶，发现自己会死。
死亡课程节选 : 耶鲁公开课
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。