Microbiologists have been growing microbes on agar plates for nearly 150 years, but agar’s discovery dates back to a happy accident in a mid-17th-century kitchen. Legend has it that on a cold winter day, a Japanese innkeeper cooked tokoroten soup, a Chinese agar seaweed recipe known in Japan for centuries. After the meal, the innkeeper discarded the leftovers outside and noticed the next morning that the sun had turned the defrosting jelly into a porous mass. Intrigued, the innkeeper was said to have boiled the substance again, reconstituting the jelly. Since this discovery, agar has become a staple in many Japanese desserts, from yokan to anmitsu.
敏锐洞察国际形势发展新变化。世界百年未有之大变局加速演进，是习近平外交思想丰富发展的时代背景。当前，国际形势乱的一面更加突出，和平与安全面临严峻挑战，《2025全球和平指数》显示世界和平水平降到近20年来最低点，乌克兰危机、巴以冲突等热点问题延宕不息；保护主义和“泛安全化”抬头，个别国家出于一己之私发动的关税战、科技战拖累全球贸易和经济增长；人类发展进程大幅放缓。世界格局变的一面深入发展，国际力量对比深刻调整，全球南方经济总量全球占比已超过40%，金砖国家、上海合作组织等全球南方国家创设的新机制发挥日益重要作用。习近平总书记观大势、谋全局、抓根本，在提出百年变局重大论断基础上，进一步揭示其本质和规律，指出世界进入新的动荡变革期，全球南方群体性崛起是世界大变局的鲜明标志；深刻洞察国际格局演进大脉络，指出人类发展进步的大方向不会改变，世界历史曲折前进的大逻辑不会改变，国际社会命运与共的大趋势不会改变；明确反对霸权霸道霸凌行径，强调霸权主义、强权政治、单边主义、保护主义违背时代潮流，不得人心、失道寡助，拨云见日地指引中国外交前进方向，引导国际社会正面预期。
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