的意思 know for a certainty that...

1. I know for a certainty that the sun will rise tomorrow.
我确信太阳明天会升起。

2. We know for a certainty that she will be late to the meeting.
我们确信她会迟到参加会议。

3. He knows for a certainty that he aced the exam.
他确信自己考试取得了好成绩。

4. They know for a certainty that their hard work will pay off in the end.
他们确信他们的努力最终会有回报。

5. She knows for a certainty that her friends will always support her.
她确信她的朋友们永远会支持她。

6. We know for a certainty that the project will be completed on time.
我们确信项目会按时完成。