最好的角色是那些在合上书后仍久久留在你心中的角色。
The best characters are the ones that stay with you long after the book is closed.
The meaning of "knowing" has shifted from being able to remember and repeat information to being able to find and use it.
中心地是经济景观的节点，区域的生命围绕它们跳动。
水产养殖的未来在于循环水系统——它们将废物转化为机遇。