Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
每部电影都是一次新的挑战。
先生,你为什么要跑?你是为了世界和平吗?你是为了无家可归者吗?你是为了妇女权利吗?为了保护环境吗?他们就是不相信,有些人跑步,什么都不为,我只是想跑。我只是想跑。
挑战在于使不可见的东西变得可见。
The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.