基本解释[医药科学]计数管时滞英汉例句双语例句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。词组短语短语counter lag -time 计数器滞后时间专业释义医药科学计数管时滞