尽力 (jìn lì): làm hết sức mình

I did my best on this exam; although the score wasn't the highest, I have no regrets.

The doctors are doing their utmost to save that patient, hoping he can survive.

No matter the outcome, I will do my best to help you complete this project.

He tried his best to control his emotions, but tears still streamed down.

To catch the early train, she ran toward the station as fast as she could, but still missed it in the end.