通過已知數(shù)可以算出未知數(shù).The unknown number can be calculated from the data.反射允許在運(yùn)行時(shí)檢查已知數(shù)據(jù)類型.Reflection allows known data types to be inspected at runtime.在微分方程組中驅(qū)動(dòng)力作為已知數(shù), 所以驅(qū)動(dòng)力直接影響著微分方程組的求解結(jié)果.The force is given in the differential ...