The process of disarmament is at a crucial turning point.

裁军正处在一个关键的转折点。

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

他就任教师工作是他一生的转折点。

Note the abrupt transition (arrows) from urothelium to intestinal-type epithelium in this example of intestinal metaplasia seen in a bladder biopsy.

这是一例活检标本，箭头所指处为然转变为肠的转折点。

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处理苯的吸附时，出现折线形的吸附等温线，折线的转折点正好是单分子层吸附与多分子层吸附的分界点。