co 2 TVH noi' chuyen ve` hoc tap :
TVH1 :may` hoc gjoi hoa' dung' ko?
TVH2: ukm
TVH1 :the' do' may` phan biet Fe va Cu ma` ko dc dung` tinh' chat hoa' hoc nao`?
TVH2 :????(nghi~)
TVH1: ga` wa' .may` mang dj ban' cai' nao` nhieu` tien` hon thi day' la` Cu con` cai' nao it' tien `hon thi` cai' day' la Fe.
TVH1: ?troi`