The simple fact of how important group membership is to us, and how easily we join groups, often without realising it, is both a subtle and profound observation about human nature.

我们所属的群体对于我们的重要性，以及我们经常在无意识的情况下如此轻易地加入不同的群体，这些都是关于人性微妙而又深刻的观察。

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Observation group, the first day after birth were swimming and touching, the control group, only shower.

观察组于出生后第一天开始进行游泳和抚触，对照组仅淋浴。

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Methods 80 elderly patients in my hospital suffering phlebitis were randomly divided into control group and observation group in-patient ward.

方法将本院住院发生静脉炎的80例老年患者随机分为对照组和观察组。

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In addition, 81 percent of surgery patients had impotence problems compared with 44 percent in the observation group.

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On Friday police also raided offices of the ZESN -- an independent election observation group -- in Harare, according to a program manager for the group.

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The rate was six percent in the observation group.

MSN: Prostate cancer surgery fails to cut deaths in study