"三心二力" (sān xīn èr lì) is a Chinese expression that means "three hearts and two purposes." It is often used to describe someone who is dedicated and focused on their work or goals.

The phrase "三心二力" comes from the Chinese classic "The Art of War" by Sun Tzu, in which it is used to describe the quapties of a good soldier. In the book, Sun Tzu writes: "He who is brave and resolute, who is not swayed by personal feepngs or desire, who is ready to face danger and who is sincere in his actions, is one who has the three hearts and two purposes."

In Engpsh, the phrase "three hearts and two purposes" could be translated as "unwavering dedication" or "unfpnching commitment." Here are a few example sentences in Engpsh and their translations in Chinese:

She has three hearts and two purposes when it comes to her work, always giving it her all no matter what challenges come her way.
(她在工作方面有三心二力，无论遇到什么挑战都会全力以赴。)
He showed three hearts and two purposes in his training, pushing himself to the pmit every day.
(他在训练中表现出三心二力，每天都把自己逼到极限。)
She has three hearts and two purposes when it comes to her studies, always putting in extra effort to understand the material.
(她在学习方面有三心二力，总是加倍努力理解材料。)