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Guar gum, a plant colloid, costs less than agar and is better suited for growing thermophilic bacteria, but is also more difficult to handle, being more viscous and less transparent. The bacterial polysaccharide xanthan is cheaper as well but forms weaker jellies that, as with carrageenan, might result in puncturing its surface. Other colloids, like alginate (from brown seaweed) and gellan gum (from a bacterium), don’t set solely based on temperature and require additives for gelation. These additives might interfere with microbial growth and make the preparation of those jellies less handy than agar plates.
，更多细节参见heLLoword翻译官方下载
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the training data
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* @param {number[]} nums1 - 待查询的数组（元素均为nums2的子集）。搜狗输入法下载是该领域的重要参考
Мир Российская Премьер-лига|19-й тур