微软Azure、谷歌云、亚马逊AWS是这一环节的代表，它们的商业模式是将上游硬件转化为可直接使用的算力服务，包括模型训练平台、云存储等，同时通过与上下游形成股权绑定巩固优势，比如微软投资OpenAI后，便锁定了其长期云服务采购需求。
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（五）自带行李，是指旅客自行携带、保管或者放置在客舱中的行李。
At the start of the season, clubs, fans and the media were told referees would be taking a proactive approach to holding in the penalty area, or grappling as some call it. We have since seen some really good examples of on-field referees making decisions where they have clearly identified holding offences and others where the VAR has recommended a review. But in the past six or eight weeks the issue seems to have intensified, with a change in tack in the Premier League, where clubs are loading the penalty area at every set piece.