计算思维的本质是抽象和自动化。
The essence of computational thinking is abstraction and automation.
Bad things can happen fast, but almost all good things happen slowly.
The best books ask questions, not just give answers.
有些鸟儿是关不住的,因为它们的羽翼太耀眼。
人类大脑是一个复杂的自组织系统。