They have heavy and straight tree trunks.

牠们有又重又直的树干。

youdao

Tie the laces together, stretch them between two tree trunks, tie them around and hang the plastic over, like a tent.

把鞋带连在一起，绕过两棵树系起来，把塑料布放在上面，像一个帐篷。

youdao

Treecreeper is a small forest bird with large claws for climbing tree trunks in search of insects.

旋木雀是一种小型的森林鸟类，有巨大的爪子，用来爬上树干寻找昆虫。

youdao

Corals have hard, stony skeletons that grow like tree trunks.

VOA: special.2009.05.12

And these tree trunks were the chords and at the base of each of these chords at least conceptually, theoretically, is this thing called the root.

这些树干就是和弦，而每个和弦的底部，从理论上说，就是被称为根的东西。

耶鲁公开课 - 聆听音乐课程节选

One of the things that we discussed was this type of imagery here where you have vertically these pillars, if you will, or we could even call--the more I sort of looked at this--sort of call them tree trunks almost.

我们讨论的问题之一是这里的这种意象，这些垂直的柱子，如果你愿意的话，我们可以称之为，我越看越觉得称之为树干比较好。

耶鲁公开课 - 聆听音乐课程节选

We know how easily these splendid woodpeckers hop around tree trunks to stay out of sight.

WSJ: The Brains of the Animal Kingdom

Together they sewed woollen panels over pieces of public art, fences, benches and even tree trunks.

BBC: Knitters transforming Newcastle's public spaces

Kon-Tiki itself was made of nine balsa would tree trunks lashed together with hemp rope.

CNN: The Kon-Tiki: Crossing an ocean on balsa