1、I know for a certainty that the company has been bought up.
我確實知道公司已經(jīng)被人收購了。

2、I know for a certainty that he will be here in time.
我肯定他會準時到這里來的。

3、I know for a certainty that the company has been bought up
我確實知道公司已經(jīng)被人收購了。

4、I know for a certainty that he will be here in time
我肯定他會準時到這里來的。

for a certainty翻譯