1. His success was achieved by hard work.

他的成功是靠辛勤劳动获得的。

2. He was praised for his industriousness¹.

他因为勤奋而受到表扬。

3. She is more diligent² than any other students in her class.

她是班上最用功的学生。

4. She performed all her duties conscientiously³.

她十分尽职尽责。

5. Labour is often the father of pleasure.

勤劳常为快乐之源。

6. She has worked tirelessly to help the homeless.

她总是不知疲倦地帮助那些无家可归的人。

7. She was so involved in her work that she didn't hear the phone ring.

她工作的十分投入，甚至没听到电话在响。

8. Victory belongs to the most persevering⁴.

胜利属于坚持不懈的人。