Translation of "Industrious" in Chinese

The Japanese are an industrious people.

- 日本人是勤奋的国民。
- 日本人是勤劳的民族。

An industrious person will succeed in life.

勤劳的人将在生活中获得成功。

He is an industrious student to the best of my knowledge.

就我所知，他是个很用功的学生。