2 sentences for 高低 (gāo​dī — height)

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. 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