《布达佩斯安全保障备忘录》于1994年12月5日由乌克兰、美国、俄罗斯和英国在匈牙利首都布达佩斯签署。该备忘录的核心内容是乌克兰承诺放弃其继承自苏联的核武器，作为交换，美、俄、英三国承诺尊重乌克兰的独立、主权和领土完整，并为其提供安全保障。

US President Donald Trump on Monday announced that he'll impose 25-percent tariff on any nation that purchases oil and/or gas ...

中国科学技术大学张斗国教授课题组，结合微纳光学的光场调控技术和计算光学显微成像技术，提出了一种基于光子晶体随机散斑照明的超越衍射极限、无标记暗场成像新技术。相关研究成果以“Planar device–enabled speckle ...

2025年2月，特朗普总统签署公告，将美国232条款下的进口铝制品及衍生品关税税率由10%提升至25%，同时取消铝和钢铁制品及衍生品所有国家的进口豁免和进口商排除情形，并新增了一批适用232条款关税的铝和钢铁的衍生产品。除一部分新增衍生产品的征收23 ...

Economists and analysts expect that the U.S. and global economies will face increasingly detrimental and potentially irreversible effects, which may include global supply chain disruptions, reduced ...

今天继续为你介绍全球贸易格局与国际局势的变化，转载一篇有关海湖庄园协议的解读。 所谓的“海湖庄园协议”（Mar-a-Lago Accord）是特朗普经济顾问委员会（CEA）主席Stephen Miran在2024年11月的一篇报告《重构全球贸易体系使用指南》中提出的多边协议构想，近期引发市场广泛讨论。 Stephen Miran的文章略显冗长，细读下来其观点大致可归类于三方面：美元汇率和储备地位、 ...

Since 2018, China has provided more than 1,000 emergency aid to more than 70 countries, targeting countries in Asia, Africa, ...

WASHINGTON, March 28 (Xinhua) -- U.S. President Donald Trump said he held an "extremely productive call" with Canadian Prime Minister Mark Carney on Friday.

作为体液免疫记忆的主要载体，记忆B淋巴细胞（Memory B cells, MBCs）的功能成熟依赖于生发中心（Germinal center, ...

“American dream got a price tag.” “U.S. only welcomes the rich.” Those comments frequented on social media as the Trump ...

On the China-U.S. AI race, he considered that competition is far fiercer than the U.S. and its Silicon Valley AI firms ...

BEIJING, April 2 (Xinhua) -- A Chinese government spokesperson on Wednesday said the latest military drills launched by the People's Liberation Army (PLA) around Taiwan and in the middle and southern ...