如果我们为之奋斗,煤炭的未来是光明的。
The future of coal is bright if we fight for it.
Sustainability isn't just a buzzword; it's our responsibility to future generations.
模糊集的概念提供了一种自然的方式来处理那些不精确性源于缺乏明确定义的类别成员标准的问题。