Either of these simple changes to a hook code-based rule would require versioning the schema and upgrading the user database.

每一种对于基于hook的规则的简单变更都将需要描述图表和更新用户数据库。

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In most cases, hook code-based E-mail rules serve the same purpose as E-mail rule package-based rules.

在大多数情况下，基于hook的电子邮件规则同基于电子邮件规则包的规则的目的是一样的。

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Yet judging by the stories I've heard from fellow couch surfers, the no-hook-up rule is broken all the time.

然而，从我在沙发冲浪朋友那儿听到的故事来看，这个无约会的规矩经常被人打破。

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Under a rule passed in 2010, carmakers were already on the hook to achieve an average 34.1 mpg across their fleets by 2016.

FORBES: 10 Ways Automakers Are Helping You Spend Less On Gasoline

This new anti-fraud rule, they contend, would potentially make it easier for broker dealers to get off the hook.

FORBES: Magazine Article