当读者每月在线（阅读）文章超过规定数量时，他们将被要求付费。

Readers will be required to pay when they have exceeded a set number of its online articles per month.

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请不要运行超过文章规定数量的用户。

Please do not run any more users than specified in this article.

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允许，但是机动幅度不能超过规定数量的6%。

Yes, there may be some difference, but is can't exceed 6% of the quantity stipulated.

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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

The problem with private banks issuing notes is that there would periodically be banking crises when the banks failed to pay on their notes and they couldn't pay out the gold that was demanded--that was required.

私有银行发行纸币的问题在于,当它们没法用要求的金子-规定的金子数量,支付它们发行的纸币时,它们将周期性的,陷入银行业危机。

耶鲁公开课 - 金融市场课程节选