Economists have correctly predicted nine of the last five recessions.
经济学家正确地预测了过去五次衰退中的九次。
长远思考，宏大思考。
Theorems are eternal; their proofs are ephemeral.
We wish to bring our monsters out and let them deal with the world.
The wise person does not dogmatically assert anything， not even that the wise person knows nothing.
免费游戏最贵的成本是玩家的信任，一旦透支就再也买不回来。