The coal industry must evolve with technology to meet global energy demands sustainably.
The beauty of mathematics only shows itself to more patient followers.
要是我夢見你愛我，你休怪，休要遷怒于睡眠；你的愛只在夢鄉(xiāng)存在，醒來，我空余淚眼。
當幫助人們擺脫貧困陷阱時，微小的改變可以產(chǎn)生巨大的影響。