This tree trunk is hollow.

这个树干是中空的。

Sap flowed from the tree trunk.

树干里流出了树液。

The woodpecker pek at the tree trunk.

啄木鸟在树干上啄。

The tree trunk of this old tree is very thick.

这棵老树的树干非常粗壮。

The beaver is gnawing through the tree trunk.

海狸在咬穿树干。

The bird was tapping on the tree trunk.

那只鸟在树干上轻敲。

The monkeys slide down the tree trunk.

猴子们在树干上滑下来。

There are clear claw marks on the tree trunk.

树干上有明显的爪印。

He used a rope to twine around the tree trunk.

他用绳子缠绕了树干。

The tree trunk is covered with moss and vines.

树干上长满了苔藓和藤蔓。