Conduct visual test for the operators every half year.
对操作工每半年进行视力检查。
All exhibitions in this museum are temporary exhibitions and change every half year or one year.
该馆展示皆为特展,每半年至一年就有新作。
But these articles seemed to show up once every half year and always talked about it as if it was something new.
但这些文章好像每半年就出现,而且经常把它当新生事物来讨论。
The World Health Organization says tobacco kills nearly five and a half million people a year -- another victim every six seconds.
VOA: special.2010.05.31
The World Health Organization estimates about two million people die prematurely every year due to air pollution, more than half in developing countries.
VOA: standard.2009.03.23
WHO reports more than three-and-a-half million people die every year from malnutrition-related causes.
VOA: standard.2010.01.02
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