她在派对上不停地谈论自己根本不了解的艺术品，显得很做作。

Her constant talk about artworks she knew nothing about at the party was pure ___pretentiousness.

他那夸张的艺术品收藏只是为了炫耀，显得很做作。

His exaggerated art collection was just for show, full of ___pretentiousness.