self.base_url = base_url
Collections of Documents vs Tables of RowsCollections of Documents is an alternative approach of organizing data in databases. The most widespread and battle-proven way is the relational, SQL way - Tables of Rows. What is the difference?，这一点在体育直播中也有详细论述
FirstFT: the day's biggest stories。业内人士推荐体育直播作为进阶阅读
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