7 sentences

1. 这两棵树的高低差不多。

   zhè liǎng kē shù de gāo​dī chà​bu​duō.

   These two trees are about the same height.

   Source: Dong Chinese Dictionary

2. 这里的围栏高低参差不齐。

   zhè​lǐ de wéi​lán gāo​dī cēn cī bù​qí.

   The fence here is of uneven height.

   Source: Dong Chinese Dictionary

3. 这条小路高低不平，很难走。

   zhè tiáo xiǎo​lù gāo​dī bù​píng, hěn nán zǒu.

   This path is uneven and very difficult to walk on.

   Source: Dong Chinese Dictionary

4. 工人们正在测量地基的高低，确保地面的水平误差在规定范围内。

   gōng​rén men zhèng​zài cè​liáng dì​jī de gāo​dī, què​bǎo dì​miàn de shuǐ​píng wù​chā zài guī​dìng fàn​wéi nèi.

   Workers are measuring the levels of the foundation to ensure the horizontal error of the ground is within the specified range.

   Source: Dong Chinese Dictionary

5. 我劝了半天，他高低不听。

   wǒ quàn le bàn​tiān, tā gāo​dī bù tīng.

   I spent a long time trying to persuade him, but he simply wouldn't listen.

   Source: Dong Chinese Dictionary

6. 他说话不知高低，没少得罪人。

   tā shuō​huà bù zhī gāo​dī, méi shǎo dé​zui rén.

   He doesn't know how to speak appropriately and has offended many people.

   Source: Dong Chinese Dictionary

7. 费了老大劲，高低把这事办成了。

   fèi le lǎo​dà jìn, gāo​dī bǎ zhè shì bàn​chéng le.

   After a lot of effort, we finally managed to get it done.

   Source: Dong Chinese Dictionary