The net effect of the formula is the normalization of the gross profit generated by individuals that have various billing rates, but will incur similar carbon emissions.

这个公式的最终效果是个人各种记账率产生的总利润，但将导致类似的碳排放。

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At present, it is a big blank to surf the net on accounting and safety certification mechanism in a lot of districts, and there is not a set of intact network billing system.

目前，很多小区上网在计费和安全认证机制上却是一大空白，没有一套完整的计费系统。

youdao

The cable billing runs an operating margin (net before depreciation, interest and taxes, as a percent of sales) of 11%, versus 30% for fund servicing.

FORBES: The Track Less Taken