4 sentences

1. 学习好比爬山，需要坚持不懈。

   xué​xí hǎo​bǐ pá​shān, xū​yào jiān​chí​bù​xiè.

   Learning is like climbing a mountain; it requires perseverance.

   Source: Dong Chinese Dictionary

2. 面对重重挫折，他依然坚持不懈。

   miàn​duì chóng​chóng cuò​zhé, tā yī​rán jiān​chí​bù​xiè.

   In the face of many setbacks, he still persevered.

   Source: Dong Chinese Dictionary

3. 我们要坚持不懈地推进反腐倡廉建设。

   wǒ​men yào jiān​chí​bù​xiè de tuī​jìn fǎn​fǔ​chàng​lián jiàn​shè.

   We must persevere in promoting clean government and the fight against corruption.

   Source: Dong Chinese Dictionary

4. 只要坚持不懈，你终会实现自己的梦想。

   zhǐ​yào jiān​chí​bù​xiè, nǐ zhōng huì shí​xiàn zì​jǐ de mèng​xiǎng.

   As long as you are persistent, you will eventually realize your dream.

   Source: Dong Chinese Dictionary