复杂性理论告诉我们,并非所有问题都是平等的;有些问题本质上比其他问题更难。
"The silence between words is often more powerful than the words themselves."
Sustainable development is not an option, but a necessity for the coal sector.
白云谦卑地站在天边,晨光给它披上壮丽的光彩。
The beauty of cinema lies in its ability to evoke emotions without words.