As with crypto-currency, records of who owns what are stored on a ledger that is maintained by thousands of computers around the world. These records can’t be forged because the whole system operates on an open-source network.
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if (chunks === null) return null; // End of stream，推荐阅读夫子获取更多信息
C++ API — 用于原生集成并支持流式传输的引擎、会话和对话类