Joan could not dissimulate.是什么意思？

Joan could not dissimulate.

琼不会装假.

Joan

n. 琼（女子名）；

例句
Stars including Joan Collins are expected to attend.
包括琼·柯林斯在内的明星们,届时预计会参加。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

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。

dissimulate

vt.& vi. 掩饰（感情），假装（镇静）；

例句
This man was too injured to dissimulate well...
这个人受伤严重，无法完全遮掩住。