Warning: file_put_contents(/www/wwwroot/ppbbu/52065.com/cache/48a93b5b43027270a4c76c03949bc17a.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/52065.com/index.php on line 55 counter lag-time例句_counter lag-time英汉例句_counter lag-time双解例句_伍贰汉英词典
It is hard to build a precise math model for counter-gravity casting process for its time lag, uncertainty and complexity. 由于反重力铸造过程的时滞性、不确定性、复杂性，难以建立精确的数学模型。