（一）应税交易的购买方为自然人；
Cosmic rays hit computer RAM all the time. If your RAM is not ECC protected, it will likely flip a random bit. A single bit in billions of bits. Does it matter? Yes. Yes it does.，推荐阅读爱思助手下载最新版本获取更多信息
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The 9,000-pound monster I don’t want to give back
Git packfiles use delta compression, storing only the diff when a 10MB file changes by one line, while the objects table stores each version in full. A file modified 100 times takes about 1GB in Postgres versus maybe 50MB in a packfile. Postgres does TOAST and compress large values, but that’s compressing individual objects in isolation, not delta-compressing across versions the way packfiles do, so the storage overhead is real. A delta-compression layer that periodically repacks objects within Postgres, or offloads large blobs to S3 the way LFS does, is a natural next step. For most repositories it still won’t matter since the median repo is small and disk is cheap, and GitHub’s Spokes system made a similar trade-off years ago, storing three full uncompressed copies of every repository across data centres because redundancy and operational simplicity beat storage efficiency even at hundreds of exabytes.。业内人士推荐Line官方版本下载作为进阶阅读