In the United States, the fixed-rate, level-payment mortgage is the most popular way, which gives rise to extension risk, the focus of American commercial banks.

美国住房抵押贷款主要采用固定利率等额还款方式，因而利率上升带来的延展风险是美国商业银行关注的焦点；

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VeriFone has decided that calling out claimed security holes and focusing on enterprise-level payment options aren't enough to take on Square.

ENGADGET: VeriFone outs Sail mobile payment system, gives Square the evil eye

Many energy providers offer so-called budget-bill or level-payment plans that allow you to pay a set monthly amount for energy.

WSJ: Spread Out Your Energy Costs

Once consumers are aware of an expected level of technical performance that involves their lives, that performance becomes table stakes and they will expect that level of technical competency at any level of payment.

FORBES: Why You Might Want Your Next Medical Exam Via Computer