计算思维的本质是抽象和自动化。
The essence of computational thinking is abstraction and automation.
A building should be rooted in its place, but reach out to the world.
钓鱼的人躬着身子,不是要对鱼恭恭敬敬;用虫子作为诱饵捕鼠,也不是因为喜爱老鼠。
怯懦囚禁灵魂,希望还你自由。