turning point

It was a turning point in his career.

这他事业上转折点。

The process of disarmament is at a crucial turning point.

裁军正处在个关键转折点。

His induction as a teacher was a turning point in his life.

他就任作他转折点。

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处理苯吸附时，出现折线形吸附等温线，折线转折点正好单分子层吸附与多分子层吸附分界点。