keep track of

keep keeper keeping keepsake keep A at B keep a careful watch on keep a clear berth of sb keep a close watch on keep a close watch over keep a contract keep a fast keep a firm hand on

Debye Debye equation Debye frequency Debye length Debye relaxation time Debye shielding Debye specific heat Debye t law Debye temperature Debye-Heckel limiting law