2 sentences

1. 我情不自禁地哭出声。

   wǒ qíng​bù​zì​jīn de kū chū​shēng.

   I burst into tears.

   Source: OpenSubtitles

2. 听到这个好消息，他情不自禁地欢呼起来。

   tīng​dào zhè​ge hǎo xiāo​xi, tā qíng​bù​zì​jīn de huān​hū qi​lai.

   Hearing the good news, he couldn't help but cheer.

   Source: Dong Chinese Dictionary