And the more a group punished itself, the lower its earnings.

VOA: special.2009.10.21

Over here in the lower left corner, we have elements that as a group have very low values of average valence electron energy.

在底层的左侧角落，我们看到以组为单位的,价电子能较低的元素。

麻省理工公开课 - 固态化学导论课程节选

(Recording) Munjara says her group needed the support of religious leaders to help lower the stigma surrounding HIV-positive women.

VOA: standard.2009.10.21

In September,a power struggle erupted in violence in the lower Juba region between al-Shabab and Hizbul Islam, a clan-based Islamist-nationalist group which had been al-Shabab's main ally in its year-long battle to overthrow the U.N.-backed government in Mogadishu.

VOA: standard.2010.01.02