They also found that other species like kudzu, a climbing vine, required more rainfall than is typical.

他们还发现，其他物种，如葛根（一种攀植物），需要的降雨量比通常要多。

David Gergen, a doyen of American political communications, advised candidates in debates to pick the three or four points they wanted to drive home.

美国政治传播领域的元老级人物卫·葛根建议候选人在辩论中挑出三到个他们想让众牢记的关键点。

If someone could invent some use for Kudzu and remove it from southern farmland, his or her fortune would be assured.

如果有人能为葛根发明一些用途并将其从南方农田中移除，他或她的财富就会得到保证。