Comparison between random dithering and ordered dithering. Left to right: random, ordered.
self.conn.close()
，这一点在搜狗输入法2026中也有详细论述
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What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it: