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Agar comes from multiple sources, as many red seaweeds are “agarophytes” (that is, seaweeds containing agar in their cell walls). Species of Gelidium are the most important source of bacteriological (lab-grade) agar. Other main agarophytes, largely used for culinary agar, include red seaweeds from the genera Gracilaria, Pterocladia, Ahnfeltia, and others. Species from the genera Eucheuma, Gigartina, and Chondrus have been used as agarophytes in research during agar shortages.9
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热度攀升，离不开政策支撑。2025年3月，中办、国办印发《提振消费专项行动方案》，提出“发展入境消费”。同年10月，“培育国际消费中心城市，拓展入境消费”被写入“十五五”规划建议。
8️⃣ 计数排序 (Counting Sort)
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