WHO's work in this area includes standard-setting; research and development; vaccine regulation, quality and safety; vaccine supply; immunization financing; and immunization system strengthening.

世卫组织在该领域的工作包括制定标准、研究开发、疫苗监管、质量和安全性、疫苗供应、免疫资助及免疫系统加强。

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Calais says that because Haiti poses safety concerns and a difficult work environment with a poor road access system, it's been neglected by seismologists.

Calais说，由于海地的安全隐忧和由一个有恶劣的道路交通系统造成的艰难的工作环境，地震学家对海地没有重视。

youdao

Sometimes it makes possible to accelerate work, to increase safety and to dispose the important parameters of system.

有时它可能加速工作，以增加安全性和处置中的重要参数的系统。

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"We've hired 100 people to work 100 percent on pipeline safety in our distribution system over the last two years, " he said.

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Our safety net should not be a system that encourages people to stay home and live off the work of others.

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John Stevenson, a spokesman for the Department for Work and Pensions told CNN the government already provides "safety net" essentials like food and housing through the benefits system.

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