3 sentences

1. 我觉得这有点悲哀。

   wǒ jué​de zhè yǒu​diǎn bēi'āi.

   I think it's kind of sad.

   Source: OpenSubtitles

2. 虚度光阴是人生最大的悲哀。

   xū​dù guāng​yīn shì rén​shēng zuì dà de bēi'āi.

   Wasting time is the greatest sorrow of life.

   Source: Dong Chinese Dictionary

3. 听到这个不幸的消息，他感到十分悲哀。

   tīng​dào zhè​ge bù​xìng de xiāo​xi, tā gǎn​dào shí​fēn bēi'āi.

   He felt deeply saddened by this unfortunate news.

   Source: Dong Chinese Dictionary