As you plan -- or even go -- on your summer vacation, think about this: More and more Americans are no longer taking a few weeks off to suntan and sightsee abroad. Instead they're working in orphanages, building schools and teaching English. 

如果你正谋划如何过暑假，考虑下这个：越来越多的美国人不再花数周时间去晒日光浴或者去国外观光旅行，他们去孤儿院做义工，参与学校建设，教孩子们英语。

It's called volunteer tourism, or "voluntourism," and it's one of the fastest growing trends in travel today. More than 1.6 million volunteer tourists are spending about $2 billion each year. 

这就是“公益旅行”，已经成为旅行界发展最迅速的趋势之一。每年，有超过160万志愿者游客花费大约20亿美元。