Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
Coal enterprises must actively adapt to energy structure adjustments and accelerate transformation and upgrading.
诗歌是强烈感情的自然流露：它源于在宁静中回忆的情感。
The world is not a problem to be solved, but a mystery to be lived.
尝试过，失败过。没关系，再尝试。再失败，失败也是一种进步！