仔细推究to carry out a detailed investigation

• 故事的虚实真伪，我未及细究。

  I have yet to carry out a detailed investigation into whether this story is true or not.

• 打假中队人员通过深查细究，一举捣毁了这一制假窝点。

  The members of the anti-forgery detachment smashed this forgery den with one blow after a detailed investigation.