Qualified investigators play a key role in guaranteeing the quality of clinical trials.

合格的研究者是保证临床试验质量的关键。

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On the basis of guaranteeing the quality, we will offer the most competitive price for mutual benefits.

在此基础上保证质量，我们将提供最具竞争力的价格，为双方共同的利益。

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Providing the quality literature information environment is the key of guaranteeing the quality of information service.

提供优质的文献信息环境，是保证信息服务质量的关键。

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These gigs are lucrative, but ITT takes on more risk--by not only selling the hardware, but sometimes installing it and guaranteeing the quality of the effluent and the power usage.

FORBES: Muckraker

He said that one of the major challenges for the country is to continue guaranteeing the sustainability and quality of social services, such as education, health, culture, sports and social security.

UNESCO: MEDIA SERVICES