NP完全性的概念为理解问题的复杂性提供了一个强大的工具。
自然的足迹不仅要在其常规过程中追寻,还要在她似乎被迫迂回转折时探寻。
Every ton of low-carbon cement we produce is a step toward a healthier planet.
I think the most powerful and enduring brands are built from the heart. They are real and sustainable. They are not manufactured by a marketing department.
Open your eyes, look within. Are you satisfied with the life you're living?