4 sentences

1. 钥匙在锁里折断了。

   yào​shi zài suǒ li zhé duàn le.

   The key snapped off in the lock.

   Source: OpenSubtitles

2. 我以为我的胳膊会折断。

   wǒ yǐ​wéi wǒ​de gē​bo huì zhé duàn.

   I thought my arm would break.

   Source: CCMatrix

3. 她折断了一颗牙。

   tā zhé duàn le yī kē yá.

   She broke a tooth.

   Source: CCMatrix

4. 喀嚓一声，她用膝盖折断了扫帚柄。

   kā​chā yī​shēng, tā yòng xī​gài zhé duàn le sào​zhou bǐng.

   She broke the broom handle over her knee with a loud snap.

   Source: AI Challenger 2017