拖动力

拖动力	tuō dòng lì	motive force / traction
拖	tuō	variant of 拖
拖	tuō	to drag / to tow / to trail / to hang down / to mop (the floor) / to delay / to drag on
拖动	tuō dòng	to drag / to tow / (computing) to drag (mouse operation)
动	dòng	(of sth) to move / to set in movement / to displace / to touch / to make use of / to stir (emotions) / to alter / abbr. for 动词, verb
动力	dòng lì	motive power / (fig.) motivation; impetus
力	Lì	surname Li
力	lì	power / force / strength / ability / strenuously