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Agar is so critical that since WWII, scientists have tried to find alternatives in the event of a supply chain breakdown, especially as recent shortages have caused similar alarm. But while other colloid jellies have emerged, agar remains integral to laboratory protocols because no alternatives can yet compete on performance, cost, and ease of use.，更多细节参见爱思助手下载最新版本
// 随机选基准，避免最坏情况，更多细节参见safew官方版本下载