There is no proof that treatment of asymptomatic metastases substantially increases survival, and it may reduce quality of life.

没有证据表明无症状转移疾病治疗能实质性增加生存期，它可能会降低生活质量。

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The article introduced how to reduce quality cost by applying quality management theory and method to improve rate of qualified of resistors painting process in QC team activity.

本文介绍了利用QC小组开展活动，运用质量管理的理论和方法，提高电阻器生产过程中涂漆工序的合格率，降低了质量成本。

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Certain irrigation practices degrade soil quality and reduce agricultural productivity.

某些灌溉措施会降低土壤质量，降低农业生产力。

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They said the dredged material would reduce water quality.

VOA: special.2009.10.06

Polls by the New York Times and CBS News and the Wall Street Journal and NBC News show growing public concern that efforts to cover uninsured Americans could reduce the quality of health care for those who already are covered by health insurance.

VOA: standard.2009.07.31

Furthermore, its proposals to change ratios and introduce childminder agencies are likely to reduce quality for children.

BBC: Nursery ratio plans criticised by government adviser

He said plans to reduce the starting salaries of police officers could reduce the quality of new recruits.

BBC: Hampshire & Isle of Wight

Out-of-service monitors and unchanged filters may reduce the quality and availability of critical data needed to assess radioactive threats to public health and the environment.

FORBES: Inspector General Faults EPA Radiation Monitoring