VOA慢速英语:A School Newspaper Links Sioux Indian Teens to Their Community

The two reporters were moving around in search of human interest vignettes. 
两位记者在转来转去，物色有人情味的材料。 

compare to把...比作
He compared the girl to the moon in the poem.
他在诗中把那姑娘比作月亮。

a couple of  一对， 几个；三两个

It will take a couple of years to harness that river. 
治理那条河流要花两三年时间。 

talk to与……谈话

Can I talk to Susan, please? 
请问, 我和苏珊说句话行吗?

take turns轮流
They were taking turns to be on the night shift.
他们轮流做夜班。