The crooked trunk tree was sad. He thought, "How ugly I am! All the others are straight and shapely. I alone have a crooked trunk. ""

这棵树干弯曲的树很难过。他想，“ 我长得真丑！其他的树都又直又有型，只有我，长得曲里拐弯的。”

youdao

The tree trunk was hollow inside.

这树干里面是空的。

《牛津词典》

This pine tree looks tall and strong but actually its trunk is hollow.

这棵松树看起来又高又壮，但实际上它的树干是空心的。

youdao

He was about half way across the river when the tree trunk moved suddenly, John fell from it onto the ice.

VOA: special.2010.06.26

I'd like to go by climbing a birch tree, And climb black branches up a snow-white trunk toward heaven, till the tree could bear no more, But dipped its top and set me down again.

我真想去爬白桦树，沿着雪白的树干，爬上乌黑的树枝，爬向那天心，直到树身再支撑不住，树梢碰着地，把我放下来。

耶鲁公开课 - 现代诗歌课程节选

After about five years, cacao trees start producing large fruits called pods, which grow near the trunk of the tree.

VOA: special.2010.02.17

For example, the density of wood in a palm tree trunk varies, depending on the load it must support.

FORBES: MIT Architect Plans to Print Her Own Buildings

The tear-shaped frame of the Treetent is constructed from steel, covered in canvas and anchored to a tree trunk.

CNN: Sculptor creates treehouse-like tent

Rachel McDonald, the pub's owner, said there was "lots of mud everywhere" and said the river had been blocked by a fallen tree trunk.

BBC: Homes in Somerset are flooded as river bursts