Hit "Run" to watch particles bounce around with quadtree-accelerated collision detection:
async *transform(source) {
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一个数据是，2009 年平板电视销量占家电下乡彩电销量的比例达 47%，其中第四季度，平板电视销量占比已达到 62%。
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It is "probably the most dangerous time for adult Emperor penguins because they haven't got their waterproof suits on," he says. If they go into water, they are likely to die.