The mathematical model of hydraulic regime of ring-shaped heat-supply network is established, and the pressure head check formula for quota heating is given.

建立了环状管网水力工况的数学模型，给出限额供热的压头校核公式。

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Companies using the milk for further production (e.g. of powdered infant formula) normally check the protein level through a test measuring nitrogen content.

而使用牛奶进行下一步加工(比如婴幼儿配方奶粉)的公司，一般通过测量含氮量来检测蛋白质含量。

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Then your view selection formula need only check for that flag.

这样，视图选择公式就只需要检查那个标记。

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According to an ongoing investigation by the Washington Post, who initiated the McColo shutdown, the Srizbi bots have been programmed with a mathematical formula that in the event of a shutdown generate a random but unique web address to check for updates.

BBC: Spam on rise after brief reprieve