The dedicated work of volunteer village malaria workers is essential to prevent resistant malaria spreading from Cambodia to Africa, but the challenges are great.

乡村防治疟疾志愿工作者的勤奋工作是预防耐药性疟疾从柬埔寨向非洲蔓延的关键，但面临极大挑战。

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Workers would think of the provisional bonus as theirs, and work harder to prevent it from being taken away.

员工们会认为这个“临时”的奖金是归他们所有的，并且更加努力的工作来防止奖金被收回。

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Workers have been pumping sea water into reactors in an effort to prevent further damage.

工人尽力给反应器注入海水以避免进一步的损失。

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Now greedy CEOs want to prevent workers from joining unions to level the playing field.

NPR: Possible Change To Labor Law Ignites Controversy

In addition, the secretary of Homeland Security must have "implemented a mandatory employment verification system to be used by all employers to prevent unauthorized workers from obtaining employment in the United States, " according to the bill summary.

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There is nothing we can do now to prevent it in workers exposed to asbestos throughout the 1950s, 1960s and 1970s.

BBC: NEWS | Health | West 'facing asbestos epidemic'