if (arr[j] arr[j + 1]) { // 升序：前面的大于后面的就交换
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:
，这一点在51吃瓜中也有详细论述
Andrew uses only 39 keys on each of his keyboards，这一点在Line官方版本下载中也有详细论述
Published by matejlou
writev(batch) { for (const c of batch) addChunk(c); },