一个人肚子空空,心事重重,总是睡不好觉的。
We must balance the need for energy with the need to protect our planet.
To promote the high-quality development of the coal industry, we must rely on technological innovation and intelligent upgrading.
宇宙充满了神奇的事物,耐心地等待着我们的智慧变得更加敏锐。