Rot in the tree trunk caused the tree to fall.

树干的腐烂导致树倒了。

The intensity of the explosion is recorded on the charred tree trunks.

那些烧焦的树干表明爆炸的强烈。

He hewed a canoe out of a tree trunk.

他把一根树干凿成独木舟。

Bombproof -A hold or anchor that is thought to offer the utmost security; for example, a top-rope anchor around a large, stable tree trunk or immovable boulder.

非常可靠的支点或保护点，例如，大树或者巨石上做的顶绳保护锚点。

He had not gone far before he met a little man, all in brown, the color of the tree trunks, and with a face tanned to the shade of a beechnut.

他没走多远就遇见一个矮小的男人，全身穿著褐色衣服，就像树干的颜色，而他的脸晒得跟榉子般的黝黑。