costly mistake是什么意思

双语例句

(1)But spelling mistakes still prove common and costly- just under a quarter of people have been embarrassed by a spelling mistake they made at work.

但是拼写错误仍然是非常普遍的，而且成本很高——略少于1/4的人曾经因为在工作中犯拼写错误而陷于尴尬境地。

(2)That may be a costly legal mistake.

那可能是一个损失极大的法律错误。