Actually, that's not quite right.是什么意思？

Actually, that's not quite right.

实际上, 那不完全对。

actually

adv. 实际上，事实上，确实，竟；

例句
How big is the abyss between what you think you are and what you actually are?
你对自己的认识和真实的你之间差别到底有多大？

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

quite

adv. 相当，很，非常，确实如此；

例句
For a novelist, that's quite an accomplishment...
对于一位小说家来说，那是相当了不起的成就。

right

adv. 立刻，马上，向右，右边，恰当地，一直；adj. 右方的，正确的，合适的，好的，正常的；n. 正确，正当，右边，权利，右手；vt. 纠正，扶直，使正，整理，补偿；vi. （船舶等）复正，恢复平稳；

例句
Outsiders who wed islanders are given only three years' right of abode at first.
岛外的人和岛民结婚之初只能获得三年的居住权。