4 sentences

1. 这里的山势非常陡，攀登起来很困难。

   zhè​lǐ de shān​shì fēi​cháng dǒu, pān​dēng qi​lai hěn kùn​nan.

   The mountains here are very steep, making them difficult to climb.

   Source: Dong Chinese Dictionary

2. 他们计划明天清晨攀登那座陡峭的山峰。

   tā​men jì​huà míng​tiān qīng​chén pān​dēng nà zuò dǒu​qiào de shān​fēng.

   They plan to climb that steep peak tomorrow morning.

   Source: Dong Chinese Dictionary

3. 经过长时间的攀登，他们终于到达了山脉的顶点。

   jīng​guò cháng shí​jiān de pān​dēng, tā​men zhōng​yú dào​dá le shān​mài de dǐng​diǎn.

   After a long climb, they finally reached the peak of the mountain range.

   Source: Dong Chinese Dictionary

4. 勇于攀登科学高峰是科研人员必备的品质。

   yǒng​yú pān​dēng kē​xué gāo​fēng shì kē​yán rén​yuán bì​bèi de pǐn​zhì.

   The courage to scale scientific heights is an essential quality for researchers.

   Source: Dong Chinese Dictionary