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.
const len = temperatures.length;
，这一点在搜狗输入法2026中也有详细论述
（四）核反应堆，是指为了利用核反应产生的能量、中子、核素等建设的装置。，这一点在同城约会中也有详细论述
李 · 克劳是和乔布斯长期合作的广告总监，他帮苹果制作了《1984》和《不同凡想》（Think Different）两条经典广告。
It supports over 30 languages