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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.，详情可参考同城约会
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Speed is important when seeking to stop the spread of tainted foods. Yet rapid testing tools may not be sensitive enough.