在生物圈的地质历史演化中，智慧圈是众多阶段的最后一个阶段。

Every challenge is an opportunity in disguise.

Music is my language; I use it to talk to the world.

Coal enterprises must enhance their sense of social responsibility and achieve the unity of economic and social benefits.

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

宁可放过十个有罪之人，也不冤枉一个无辜者。

数学的目标是使简单的复杂化，使复杂的简单化。