2 sentences

1. 就在那一刹那，我突然明白了。

   jiù zài nà yī​chà​nà, wǒ tū​rán míng​bai le.

   At that very instant, I suddenly understood.

   Source: Dong Chinese Dictionary

2. 就在那一刹那，我突然想起了她的名字。

   jiù zài nà yī​chà​nà, wǒ tū​rán xiǎng​qǐ le tā de míng​zi.

   At that very moment, I suddenly remembered her name.

   Source: Dong Chinese Dictionary