He is unzealous about the task, so progress is slow.

他对这项任务不积极的，所以进展很慢。

Because he is unzealous about exercise, his health is poor.

因为他对运动不积极的，所以身体状况不佳。

If you are unzealous about your job, you might lose it.

如果你对工作不积极的，你可能会失去这份工作。

She is unzealous about learning English, so her grades are not good.

她对学习英语不积极的，所以成绩不理想。

They are unzealous about the project, so it did not achieve the expected results.

他们对这个项目不积极的，所以没有达到预期的效果。