down payment
noun [ C ] (also downpayment) uk/ˌdaʊn ˈpeɪ.mənt/ us/ˌdaʊn ˈpeɪ.mənt/
(分期付款的)首付款
an amount of money that you pay at the time that you buy something but is only a part of the total cost of that thing. You usually pay the rest of the cost over a period of time
I made/put a down payment on a new smart TV. 我已经交了新智能电视机的首付货款。
Synonym: deposit