between different operating systems.
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:
，更多细节参见搜狗输入法2026
Purple: ___ Press
第二十六条 增值税法第二十四条第一款第一项所称农业生产者，是指从事农业生产的单位和个人；农产品，是指初级农产品。
It's taken from the inside of the furnace, and shows plasma - gas heated to about 1,000C - glowing brightly.