折线

But for benzene, when treated with SDM-A there was a turning point in its adsorption isotherm, which corresponding to the dividing point between monomolecular and multimolecular layer adsorption.

在用SDM-A处理苯的附时，出现折线形的附等温线，折线的转折点正好是单子层附与多子层附的界点。