Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/3f970c3dde4f2f700b24074c477e6c4d.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 backward motion vector是什么意思，backward motion vector的翻译，backward motion vector音标、读音、用法和例句_甲百匯小鸡词典