常見(jiàn)例句雙語(yǔ)例句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(guò)程的時(shí)滯性、不確定性、複襍性，難以建立精確的數(shù)學(xué)模型。 返回 counter time-lag