5 sentences

1. 幸福的秘诀是自由。

   xìng​fú de mì​jué shì zì​yóu.

   The secret to happiness is freedom.

   Source: OpenSubtitles

2. 勤奋是成功的唯一秘诀。

   qín​fèn shì chéng​gōng de wéi​yī mì​jué.

   Diligence is the only secret to success.

   Source: Dong Chinese Dictionary

3. 你有什么秘诀？

   nǐ yǒu shén​me mì​jué?

   What is your secret?

   Source: OpenSubtitles

4. ‎知道幸福婚姻的秘诀是什么吗？

   ‎ zhī​dào xìng​fú hūn​yīn de mì​jué shì shén​me ma?

   Know what the secret to a happy marriage is?

   Source: OpenSubtitles

5. 秘诀是什么？

   mì​jué shì shén​me?

   What's the secret?

   Source: OpenSubtitles