The ability to customize the look-and-feel of my portal and its content is a mandatory feature for user acceptance of using a centralized IP-TV portal.

为了让用户接受使用中央IP - tv门户，自定义门户外观和内容是一项必须有的功能。

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usage is a mandatory attribute that enables you to specify how the content of this attribute has to be evaluated

usage 是一个强制属性，使您可以指定必须如何计算该属性的内容

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Mandatory accounting changes is among the core content of the research of positive accounting theory.

强制性会计政策变更是实证会计理论研究的核心内容之一。

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Consumer advocates have said that listing alcohol content should be mandatory so consumers know how much they are drinking.

NPR: Are Nutritional Labels Coming On Alcoholic Drinks

It also excludes all organic foods from mandatory GMO labeling irrespective of where they are consumed and of their GMO content.

FORBES: Who Will Cover the Costs of California's Prop. 37?