in AM, use 美国英语用 installment
1. (分期付款的)一期付款
If you pay for something in instalments, you pay small sums of money at regular intervals over a period of time, rather than paying the whole amount at once.
instalment的翻译
e.g. The first instalment of £1 per share is payable on application.
每股1英镑的首期付款应在申请时交付。
e.g. ...the first month's interest instalment on the loan.
贷款第一个月的利息还款
2. (故事、计划等的)部分;(分期出版的)分册
An instalment of a story or plan is one of its parts that are published or carried out separately one after the other.
e.g. ...the disappointing third instalment of the Highlander series.
“挑战者”系列令人失望的第三部