Research from the University of North Carolina School of Medicine, Chapel Hill, USA, suggests that parent education programmes should be considered worldwide.
来自美国查普希尔北卡罗莱纳大学医学院的研究建议,应在全世界范围考虑父母教育方案。
60-90% of school children worldwide have dental cavities.
全世界60 - 90%的学校儿童有龋齿。
This year the school was in thefinal six in this worldwide competition.
今年此校是世界竞赛最后的六支队伍之一。
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