off the mark

US /ɔːf ðə mɑːrk/
UK /ɔːf ðə mɑːrk/
"off the mark" picture
1.

不准确, 错误的

incorrect or inaccurate

:
His prediction about the election results was completely off the mark.
他对选举结果的预测完全不准确
Your calculations are a bit off the mark; let's recheck them.
你的计算有点不准确;我们再核对一下。