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def extract_text(node):
。谷歌浏览器【最新下载地址】对此有专业解读
Dithering in its simplest form can be understood by observing what happens when we quantise an image with and without modifying the source by random perturbation. In the examples below, a gradient of 256 grey levels is quantised to just black and white. Note how the dithered gradient is able to simulate a smooth transition from start to end.
有前款第一项行为，在成熟前自行铲除的，不予处罚。