自然和历史是地理知识的两个重要来源。
The future belongs to those who see possibilities before they become obvious.
我们必须将土壤健康视为粮食安全的基础。
我不怕死,我怕没尝试过。
Better to choose the freedom of poverty than the slavery of wealth.
Morality is simply the attitude we adaptto people whom we personally dislike.