// 将pivot放到正确位置（j的位置）
Blockchain technology was originally invented in 1991 by two mathematicians, Stuart Haber and W. Scot Stornetta. They first proposed the system to ensure that timestamps could not be tampered with.。业内人士推荐搜狗输入法2026作为进阶阅读
，更多细节参见搜狗输入法2026
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Strict no-logging policy so your data is secure