8 sentences

1. 他将马系在了树干上。

   tā jiāng mǎ xì zài le shù​gàn shàng.

   He tied the horse to the tree trunk.

   Source: Dong Chinese Dictionary

2. 这棵古树的树干非常粗大。

   zhè kē gǔ shù de shù​gàn fēi​cháng cū​dà.

   The trunk of this ancient tree is very thick and massive.

   Source: Dong Chinese Dictionary

3. 树干上流出了透明的树胶。

   shù​gàn shàng liú​chū le tòu​míng de shù jiāo.

   Transparent gum is flowing from the tree trunk.

   Source: Dong Chinese Dictionary

4. 青藤缠绕在古老的树干上。

   qīng téng chán​rào zài gǔ​lǎo de shù​gàn shàng.

   Green vines are entwined around the old tree trunk.

   Source: Dong Chinese Dictionary

5. 绳子的两端都系在了树干上。

   shéng​zi de liǎng​duān dōu xì zài le shù​gàn shàng.

   Both ends of the rope were tied to the tree trunk.

   Source: Dong Chinese Dictionary

6. 啄木鸟用锋利的嘴在树干上找虫子。

   zhuó​mù​niǎo yòng fēng​lì de zuǐ zài shù​gàn shàng zhǎo chóng​zi.

   The woodpecker used its sharp beak to search for insects in the tree trunk.

   Source: Dong Chinese Dictionary

7. 这只豹子正在树干上标记自己的领地。

   zhè zhī bào​zi zhèng​zài shù​gàn shàng biāo​jì zì​jǐ de lǐng​dì.

   This leopard is marking its territory on the tree trunk.

   Source: Dong Chinese Dictionary

8. 由于天气干燥，树干上的树皮开始剥离。

   yóu​yú tiān​qì gān​zào, shù​gàn shàng de shù​pí kāi​shǐ bō​lí.

   Due to the dry weather, the bark on the tree trunk began to peel off.

   Source: Dong Chinese Dictionary