enthusiasm; vigor; will

1. 她工作起來干勁十足。
   She does her work with tremendous vigour.
2. 他聰明，但不會有成就，因為他缺少干勁。
   He's clever but he won't succeed because he lacks drive.
3. 無論在什么工作崗位，他總是有股子革命干勁。
   No matter what his post is, he always works with a revolutionary drive.
4. 我們的推銷人員需要有決心和干勁。
   Our sales people need determination and drive.
5. 他聰明是聰明，但是沒有干勁，做事不會成功。
   He is clever but he won't succeed because he lacks drive.

干的英語翻譯：

勁的英語翻譯：