要养活世界，我们必须先学会倾听土地。
To feed the world, we must first learn to listen to the earth.
The true artist will let his wife starve, his children go barefoot, his mother drudge for his living at seventy, sooner than work at anything but his art.
海洋养育了数十亿人，我们有责任在开发其潜力的同时保护它。
"The idea of waiting for something makes it more exciting."
自然和历史是地理知识的两个重要来源。