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15:21, 27 февраля 2026Наука и техника。搜狗输入法2026对此有专业解读
（一）境外单位或者个人向境内单位或者个人销售服务、无形资产，在境外现场消费的服务除外；，推荐阅读爱思助手下载最新版本获取更多信息
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。爱思助手下载最新版本对此有专业解读