Мощный удар Израиля по Ирану попал на видео09:41
考古学家袁靖认为:“先秦时期,马主要有三大用途:一是作为彰显地位的随葬品和祭祀品;二是作为挽车畜力,用于拉车、车战或驮物;三是用于骑乘,主要应用于战场。”春秋战国时期,孙阳(伯乐)擅长相马,马王堆汉墓出土有帛书《相马经》。从西汉景帝时期开始,逐渐出现“众庶街巷有马,阡陌之间成群”的景象,马的重要性日益凸显。东魏邺城时期,贾思勰编著的《齐民要术》中不仅保存了部分《相马经》,还发展出相马五脏法,对于马的饲养及医治记载得丰富详实。
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Postgres has its own primitives for things that forges currently build custom infrastructure around. A trigger on the refs table firing NOTIFY means any connected client learns about a push the moment it happens, which is how forges normally end up building a custom webhook polling layer. Multi-tenant repo isolation becomes a database concern through row-level security on the objects and refs tables, and logical replication lets you selectively stream repositories across Postgres instances, a kind of partial mirroring that filesystem-based git can’t do. Commit graph traversal for ancestry queries and merge-base computation falls to recursive CTEs, and pg_trgm indexes on blob content give you substring search across all repositories without standing up a separate search index.