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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.，这一点在搜狗输入法下载中也有详细论述
"We believe we would have been strong stewards of Warner Bros.' iconic brands, and that our deal would have strengthened the entertainment industry and preserved and created more production jobs in the US," the statement from Netflix co-CEOs Ted Sarandos and Greg Peters said. "But this transaction was always a 'nice to have' at the right price, not a 'must have' at any price."