knock sth from sth
— phrasal verb with knock uk/nɒk/usverb [ T ]
to make the value of something go down by a particular amount:
A warning of significant losses knocked 10p from the group's shares.
英语词典包含110679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。