大家好，我是小雨的编辑。小余在网上搜集了一些平流层双语实例的相关信息，与大家分享一下。
对流层以对流运动开发者_JAVA百科为主，随海拔升高，气温降低，空气下热上冷不稳定，容易产生对流运动。
I want to select list items that are immediate children of #nav, that do not themselves have immediate children with an \'active\' class.
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