he observes,pointing to the very substantial cuts in air pollution emissions during the 2008 summer Olympics in the Beijing metropolitan area.

VOA: standard.2010.04.07

And he walks out into the farmyard and he observes 20 heads and 56 legs.

这个农场主有一群猪--这是漫长的一天,一群猪和一群鸡。

麻省理工公开课 - 计算机科学及编程导论课程节选