- inquire into the root of the matter; bombard someone with questions; dig out the bottom truth [cause]; get to the root [bottom] of the matter
- 究: study carefully; go into; in ...
- 底: bottom; base
- 归根究底: after all is said and done
- 盘根究底: try to get to the heart of a matter; get to the bottom of the [an] affair; inquire deeply into sth
- 盘根究底try: to get to the heart of a matter transfer
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