Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/6ec835e1d5d5f6552d1d1825f0a0a44f.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 perfectly elastic collision是什么意思,perfectly elastic collision的翻译,perfectly elastic collision音标、读音、用法和例句_食材鋪反向词典