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.
（一）故意干扰无线电业务正常进行的；，这一点在51吃瓜中也有详细论述
2.7 SELU（Scaled Exponential Linear Unit）。91视频对此有专业解读
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