5 sentences

1. 这座城市的平均海拔是三千米。

   zhè zuò chéng​shì de píng​jūn hǎi​bá shì sān qiān mǐ.

   The average altitude of this city is three thousand meters.

   Source: Dong Chinese Dictionary

2. 牡蒿通常生长在海拔较低的疏林下。

   mǔ​hāo tōng​cháng shēng​zhǎng zài hǎi​bá jiào dī de shū​lín xià.

   Japanese wormwood usually grows in sparse woodlands at lower altitudes.

   Source: Dong Chinese Dictionary

3. 研究人员在不同海拔采集了土壤样本。

   yán​jiū rén​yuán zài bù​tóng hǎi​bá cǎi​jí le tǔ​rǎng yàng​běn.

   Researchers collected soil samples at different altitudes.

   Source: Dong Chinese Dictionary

4. 工程师把这个固定标记点作为测绘的海拔基准。

   gōng​chéng​shī bǎ zhè​ge gù​dìng biāo​jì​diǎn zuò​wéi cè​huì de hǎi​bá jī​zhǔn.

   The engineer used this fixed marker as the elevation datum for the survey.

   Source: Dong Chinese Dictionary

5. 大熊猫主要栖息在海拔两千米以上的茂密竹林中。

   dà xióng​māo zhǔ​yào qī​xī zài hǎi​bá liǎng​qiān mǐ yǐ​shàng de mào​mì zhú​lín zhōng.

   Giant pandas mainly inhabit dense bamboo forests above an altitude of 2,000 meters.

   Source: Dong Chinese Dictionary