inapparent

an inapparent infection

的染

Its ratio of inapparent infection to apparent infection is about 100:1.

该病隐染与染的比例约为100：1。

when the wind speed and windward are steady , the concentration value of dimensional spot change along with time is inapparent, it may be considered steady.

在稳定风流下，空各点的气体浓度值随时变化，其浓度场是稳态的。