To guarantee quality and quantity is the highest principle of goods production.

保质保量是产品生产的最高原则。

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Both power supplier and electricity user have the responsibilities to guarantee quality of supply and to ensure safe and stable operation of power network.

保证供电能质量，确保电网安全稳定运行，是供电方和用电方的共同责任。

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Our aim is "to abide by contract, guarantee quality, deliver timely, offer excellent service". Standing on the customers' position, we make ourselves more and more perfect.

我们企业以“守约、保质、按时、优质服务”为企业宗旨，时时刻刻站在客户的角度，来不断的完善自己。

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We believed that we could finally guarantee quality, affordable care for every American.

WHITEHOUSE: President Obama on Health Reform at Families USA

The fact is, Mr Fontes says, that there is still no way to guarantee quality of service in the unlicensed bands.

ECONOMIST: Spectrum policy

The state plays an essential role as defender of this principle, setting standards and norms that guarantee quality and equality of opportunity.

UNESCO: MEDIA SERVICES