And while they eat the grass, they may need guard animals to protect them from animals that would like to eat them.

VOA: special.2010.01.19

This is individual services like teaching piano or cutting someone's grass or a hairstylist.

还有个人服务，比如教钢琴,或是帮别人修剪草坪或是作一个发型师。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

Hippopotamuses like to stand in the grass and eat most of the day.

VOA: special.2009.08.19

This tastes like grass. People aren't ready for it.' And of course, now people are ready for it."

VOA: standard.2010.02.17