 aria-label="Table of Contents"><div id=toc><ol><li role=none aria-label=开始之前><a href=#before-you-begin>开始之前</a><li role=none aria-label=速率限制><a href=#rate-limits>速率限制</a><li role=none aria-label=条件化的速率限制><a href=#conditional-rate-limits>条件化的速率限制</a><li role=none aria-label=理解原理><a href=#understanding-rate-limits>理解原理</a><li role=none aria-label=清理><a href=#cleanup>清理</a><li role=none aria-label=相关内容><a href=#see