有人居住的世界的界限是由人类知识的范围决定的。
在这个世界上,我该爱的人是我自己。
Collaboration across borders and disciplines is the only way to tackle global health challenges.
The balance between energy needs and environmental protection is the challenge of our time.
自然规律是亘古不变的,不会因尧的仁德而存在,不会因桀的暴虐而消亡。