煤炭的未来在于清洁高效利用。
为可持续性而战，就是为我们的未来而战。
Sustainability is no longer an option; it's a necessity for the future of leather tanning.
The child is not a passive recipient of knowledge but an active participant in the learning process.
儿童不是知识的被动接受者，而是学习过程的积极参与者。
小说是一面沿着大路行走的镜子。
