请问duplicatemovieclip中的depth是什意思？
帮助中的描述是：
depth The depth level of the movie clip. The depth level is the stacking order that determines how movie clips and other objects appear when they overlap. The first movie clip that your create, or instance that you drag onto the Stage, is assigned a depth of level 0. You must assign each successive or duplicated movie clip a different depth level to prevent it from replacing movies on occupied levels or the original movie clip.
可是我还是搞不懂！

平常的都是_level0
duplicate出来的都是0以上的_level1,_level2....
that is depth 层的概念

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