Plate tectonics is the unifying theory of geology.
板块构造理论是地质学的统一理论。
Collaboration across borders is essential—no single nation holds all the answers to global food security.
I've always been a fighter, and I think that's what's gotten me through.
I wonder how many people I've looked at all my life and never seen.
可持续性不是牺牲,而是机遇。