adj.面对面的;一对一的;仅限两人之间的;
例句:
...a one-on-one therapy session.
面对面的治疗时间
Virtually all instruction is in small groups or one-on-one.
几乎所有的指导都以小组或一对一的形式进行。
I need to see things one on one to know how they will turn out.
我必须看清楚每一步骤然后才知道它们最终的模样.