Vaccination to control community-wide outbreaks is most successful in small communities, when the campaign is started early and when high coverage of multiple age groups is achieved.

通过免疫接种来控制全社区的疫情。 如果及早开展接种运动并且在多个年龄人群中实现高覆盖率，在小社区取得成功的几率极大。

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For communication among parallel print port of PC and multiple single-chips, interface is divided into data, state and control groups respectively controlled by each register.

PC并行打印口与多台下位单片机的通讯，将接口分成数据、状态、控制三组，由其寄存器分别控制。

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Howeer, in the other RCT, no statistically significant differences between treatment and control groups were shown for multiple outcome measures.

然而在另一个随机对照临床研究中，治疗组与对照组多项结果无显著统计学差异。

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Over the three-year observation period, the African-American students who took part in the study had higher grade-point averages relative to multiple control groups, and the minority achievement gap overall was reduced by a dramatic 50%.

CNN: The importance of belonging