Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/a39bea207d2d7809ba112b687619c2fb.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 counter time-lag是什么意思，counter time-lag的翻译，counter time-lag音标、读音、用法和例句_94生活常识网有道词典
It is hard to build a precise math model for counter-gravity casting process for its time lag, uncertainty and complexity. 由於反重力鑄造過程的時滯性、不確定性、複襍性，難以建立精確的數學模型。