The past is a map, showing us where we have been.
小规模养殖者是可持续水产养殖的支柱；他们的知识是不可替代的。
Sometimes the simplest questions lead to the deepest theories.
The horror of the Twentieth Century was the size of each new event, and the paucity of its reverberation.
唯一真正的罪过是后悔。