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

原作的每一细节都经过了仔细研，苦心才得以重现。

They had not studied the language very thoroughly.

他们没有很仔细地研这一语言。

My ideas on semantics needed more careful exploration.

我于语义学的一些想法需要更仔细的研。