跨国合作对解决全球粮食问题至关重要。
拓扑绝缘体的美在于它们的鲁棒性;它们的表面态受到保护,不受无序和缺陷的影响。
The challenge of our time is to find balance in a world of constant connectivity.
绳:衡量。诬:歪曲、诬蔑。
"History is not just about the past; it's about how the past shapes the present."
I want to liberate America from fear. I want people to feel free to express themselves.