arr[j + gap] = key;
美国二手书零售商 Better World Books，以及总部位于英国的 World of Books，每次采购动辄数万册。内部文件还显示，员工曾讨论接洽纽约公共图书馆，甚至提到可以找某家长期资金不足的新图书馆。
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Looking at the wider picture, however, mandatory age verification appears to be a growing trend. The UK government's current implementation under the Online Safety Act has come under heavy fire for privacy concerns, while platforms like Discord have received similar critique for their face-scanning age verification efforts, not least because of associations with companies that may not be using the collected data for mere age-confirmation purposes.
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（四）其他无故侵扰他人、扰乱社会秩序的寻衅滋事行为。