苦心

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

那本书是十年苦心钻研果。

The boy puzzled his way through geometry.

那男孩煞费苦心地钻研几何学。

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

方煞费苦心设法和人达项班协议。

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

原作每细节都经过仔细研究，费尽苦心才得以重现。