CouchDB通过确保文档全部更新成功或全部失败来保持数据的一致性—文档更新要么成功，要么失败。
CouchDB maintains data consistency by ensuring that document updates are all or nothing - it either works or it fails.
CouchDB通过确保文档全部更新成功或全部失败来保持数据的一致性—文档更新要么成功，要么失败。
CouchDB maintains data consistency by ensuring that document updates are all or nothing - it either works or it fails.
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