我的狗不知道从哪咬来一根树枝。

Wǒde gǒu bù zhīdào cóng nǎ yǎo lái yì gēn shùzhī.

I don’t know where my dog found a stick to chew on.

他断了一根手指。

Tā duàn le yì gēn shǒuzhǐ.

He broke a finger.

这棵树的根很深，稳固地扎在地下。

Zhè kē shù de gēn hěn shēn, wěngù de zhā zài dìxià.

The roots of this tree are deep and firmly grounded in the ground.