下雨天什么时候水会往上流呢,下雨天什么样的情况水会往上流

{"rich_content":{"text":"","spans":null},"video":{"vid":"v028b0a90000bun1gqseh4j4sp2qteug","duration":217.223,"width":1024,"height":576,"file_size":26784801,"thumb":{"web_uri":"tos-cn-p-0000/99c8cfc3cf00462abba9eec7408746a2","width":640,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":217.223,"file_size":35511369,"w":854,"h":480},"normal":{"duration":217.223,"file_size":25920115,"w":640,"h":360},"ultra":{"duration":217.223,"file_size":33846265,"w":1024,"h":576}},"is_encrypted":null,"sp":null,"md5":"d32ea96fd78ffe9591bc34632b2b7f47","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}}