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The Algorithm: Ford-Fulkerson to Find the Bottlenecks
，更多细节参见搜狗输入法2026
22:58, 27 февраля 2026Россия
By WWII, scientists had already begun looking at alternative gelling substances for routine use in bacteriology, but concluded that agar was still better as it is both firmer and easier to handle. Today, some specialized microbiology applications use the colloid carrageenan (extracted from red seaweed Chondrus crispus, or “Irish Moss”), a more transparent and less auto-fluorescent alternative to agar (agar emits its own background fluorescence when excited by light). However, for routine bacteriological use, carrageenan is more difficult to dissolve, requires higher concentrations, can degrade at high temperatures, and forms weaker gels, which may result in puncturing its surface during the plating of cells.
北京於2020年頒布《香港國安法》，稱此舉對維持香港穩定至關重要。批評者及人權團體指，該法將社會運動及批評政府的行為刑事化，營造恐懼氣氛，扼殺香港原本活躍的公民社會。