Neff hitchhiked to New York during his Christmas vacation...
内夫在圣诞节假期里搭顺风车去了纽约。
On my way to Vancouver one Friday night I picked up a hitchhiker.
一个周五晚上，我在去温哥华的途中捎上了一个搭便车的人。
A Free Meal Though there is the problem of " hitchhikes ", each country who originates from self-interest has the driving force to join the collective action of improving the ecological environment .
虽然也存在免费搭车问题，但出于自身利益的考虑，各个国家有动力加入改善生态环境的集体行动。
hitchhikes