简单来说，世界模型 = 让 AI 在脑子里“模拟整个世界”。它不是简单的“看图、生成视频”，而是让 AI 学会世界有什么物体、物体之间怎么互动、物理规则是什么、事情会怎么发展，然后在内部构建一个虚拟的、可推理的世界。
Without agar, countries could not produce vaccines or the “miracle drug” penicillin, especially critical in wartime. In fact, they risked a “breakdown of [the] public health service” that would have had “far-reaching and serious results,” according to Lieutenant-General Ernest Bradfield. Extracted from marine algae and solidified into a jelly-like substrate, agar provides the surface on which scientists grow colonies of microbes for vaccine production and antibiotic testing. “The most important service that agar renders to mankind, in war or in peace, is as a bacteriological culture medium,” wrote oceanographer C.K. Tseng in a 1944 essay titled “A Seaweed Goes to War.”3
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