4 sentences

1. 不要低估自己的实力。

   bù​yào dī​gū zì​jǐ de shí​lì.

   Don't underestimate your own strength.

   Source: Tatoeba

2. 他们知道自己的实力。

   tā​men zhī​dao zì​jǐ de shí​lì.

   They know their own strength.

   Source: CCMatrix

3. 他太高估自己的实力了。

   tā tài gāo​gū zì​jǐ de shí​lì le.

   He overestimated his own strength.

   Source: CCMatrix

4. 是时候展示你真正的实力了！

   shì shí​hou zhǎn​shì nǐ zhēn​zhèng de shí​lì le!

   It's time to show your true strength!

   Source: CCMatrix