Sustainability is no longer an option; it's a necessity for the future of leather tanning.
可持续性不再是一个选择;它是皮革鞣制未来的必要条件。
In the end, we are all stories.
当人是兽时,他比兽还坏。
Every mathematical problem is a window into a new world of understanding.
现实一点,要求不可能的事!