{"rich_content":{"text":"互质数的意义和判断方法","spans":null},"video":{"vid":"v028b0690000bpff14sm7fi9d4j1c090","duration":192.076,"width":720,"height":406,"file_size":1038,"thumb":{"web_uri":"tos-cn-p-0000/2b667111f21e478690adb8419150218f","width":642,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":192.076,"file_size":4520802,"w":720,"h":404},"normal":{"duration":192.076,"file_size":4229606,"w":642,"h":360}},"is_encrypted":null,"md5":"","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}}
