2 sentences

1. 他俩一时兴起结了婚。

   tā​liǎ yī​shí xīng​qǐ jié le hūn.

   They got married on a whim.

   Source: OpenSubtitles

2. 他一时冲动买下了那座房子。

   tā yī​shí chōng​dòng mǎi xià le nà zuò fáng​zi.

   He bought that house on the spur of the moment.

   Source: UM-Corpus: News