Suppose someone has a contract that promises to pay an amount each period over a number of years.

假设某人有一份合约，承诺在数年内的不同时段内分开支付。

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As with an apartment rental contract, car leasing will have a fixed period — typically two or three years.

租车合同和租房一样：需要一个固定期限- - -典型的是两到三年。

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The contract executed by a creditor and a debtor for the continuous transaction of a specific commodity in a given period of time may be accompanied by a contract of mortgage of maximum amount.

债权人与债务人就某项商品在一定期间内连续发生交易而签订的合同，可以附最高额抵押合同。

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A perpetuity is an asset or a contract that pays a fixed amount of money each time period, forever.

永续年金是一种财产或者合同,规定在每一时间段内,支付一定数量的货币,直至永远

耶鲁公开课 - 金融市场课程节选

Suppose someone has a contract that promises to pay an amount each period over a number of years.

假设某人有一份合约,承诺在数年内的不同时段内分开支付

耶鲁公开课 - 金融市场课程节选

It may be that he has a tightly-drafted American-style contract which enforces a period of gardening leave if he leaves to work for another broadcaster - S4C would argue that they're hardly a competition for the History Channel, but it's likely the lawyers may well be fighting it out as we speak.

BBC: White smoke over Llanishen?

Berman and Wheeler are looking to rent space, you might say, for a nine-month-period, and a contract was arranged between the two of them.

CNN: Surrogate mother sues California couple

After the 2013 season, he will become a 29 year old free agent and will aggressively pursue a lucrative contract for an extended period of time.

FORBES: Lincecum's Reinvention Has Positively Affected His Overall Value to the World Champion Giants