[ Daim ntawv qhia ] - [ Lub Hom Phiaj ]

☞ x ≔ Daim ntawv qhia tshiab.
x aaa: ‘bbb’, ccc: ‘ddd’.
x - ‘ccc’.
✎ sau ntawv: x, tsum.
(Daim ntawv qhia tshiab) muab:‘bbb’ rau:‘aaa’