短语”犯错误“是“make a mistake"还是”make mistakes"

问题描述:

短语”犯错误“是“make a mistake"还是”make mistakes"

两个都对
make a mistake(强调某个错误)
例:
She make a mistake when adding up the bill.
她在合计帐单时出了差错.
make mistakes(泛指错误)
例:
The best of us can make mistakes.
我们中最好的人也会犯错误