苦心

The book was the result of ten years’ assiduous research.

那本书是十年钻研的成果。

The capitalist tried to hammer out an agreement with workers on overtime pay.

方煞费设法和人达成了一项加的协议。

Every aspect of the original has been closely studied and painstakingly reconstructed.

原作的每一细都经过了仔细研究，费才得以重现。

The boy puzzled his way through geometry.

那男孩煞费地钻研几何学。