跨国合作是解决全球粮食安全挑战的关键。
Collaboration across borders is key to solving global food security challenges.
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
I'm not a lover, I'm a fighter.
建筑的挑战在于平衡功能与诗意。
数学不是一项观赏性运动。