// (it isn't always in every impl)
643 0 3 SHIFT DLY IN+D ; SIGMA = 3，详情可参考谷歌浏览器【最新下载地址】
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That was the gap. confusable-vision is the tool I built to close it: render every confusable pair, measure the pixels, and put a number on what “visually confusable” actually means.。关于这个话题，Line官方版本下载提供了深入分析