2.2.2 面向对象重构版本（oop_crawler.py）
公有云、私有云和混合云各有优势，企业需要根据业务场景做出选择。
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Maguire’s contract runs out in the summer and he has yet to sign a new one, but there is optimism at Old Trafford that he will stay at the club he joined for £80m in August 2019. United host Crystal Palace on Sunday, aiming to extend their six-match unbeaten run under Carrick. They have only dropped one point in that period, with Maguire’s value to the interim head coach seen by the fact he has started every fixture of his tenure.
The couple may decide to have a second baby, after which surgeons will remove the transplanted womb. This is to save Bell from taking a lifetime of strong drugs to prevent the body's immune system attacking the transplanted organ.