娃娃0J 开发者_高级运维 2021-07-24 06:25 芥菜软腐病防治方法：芥菜软腐病是一种细菌性病害。发病初期叶片萎蔫下垂，晴天中午更为明显，发病严重的病株叶柄基部及根茎髓部完全腐烂，充满浅灰褐色、粘稠状物质，
I am looking to create a dictionary with \'roll-back\' capabilities in python. The dictionary would start with a revision number of 0, and the revision would be bumped up only by explicit method call.
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