重点讲解：
1. be unique to
独有的；特有的；
eg. Many of the 10000 other species found there are unique to the region.
在那里生存的10000种其他物种中有许多是当地独有的。
eg. Indeed financial crises are not unique to emerging markets of Asia.
事实上，金融危机并非只在新兴的亚洲市场出现。
2. head for
朝着（某一地点）行进；
eg. He headed for the bus stop.
他朝着公共汽车站走去。
eg. Most visitors will head for the theme parks but it's worth poking around the city too.
大部分的游客会直接前往主题公园，但是奥兰多城区还是很值得一逛的。
3. pick up
发现，找到；
eg. Where did she pick up this companion?
她在哪里找到这个同伴的？
eg. He visits a nearby neighborhood grocery store to pick up some food, but the narrow rows and the bustle of intent shoppers drive him away.
他去邻近的杂货铺想找些吃的，但狭窄的过道和匆忙的顾客把他挤了出来。