—— 请按键盘 空白键 开始游戏 ——

The market is always looking for the next trend.
"The scars of history are not always visible, but they are always there."
"The greatest journeys are not measured in miles, but in moments that take our breath away."
It is not the computer's fault that Maxwell's equations are not adequate to design the electric motor.
Natural experiments are a powerful tool for understanding causal relationships in the real world.
家中闲坐无聊,不妨想想,有人在为生活而辛劳;官位不能飞黄腾达,想想仍有许多才能好的读书人,人都老了还是青衣。