2 sentences

1. 这棵老树的根已经扎进了土层深处。

   zhè kē lǎo shù de gēn yǐ​jīng zhā​jìn le tǔ​céng shēn​chù.

   The roots of this old tree have struck deep into the soil.

   Source: Dong Chinese Dictionary

2. 他一个猛子扎进水里，奋力一泳，救起了落水的孩子。

   tā yī gè měng​zi zhā​jìn shuǐ​lǐ, fèn​lì yī yǒng, jiù​qǐ le luò​shuǐ de hái​zi.

   He dove into the water, swam vigorously, and rescued the drowning child.

   Source: Dong Chinese Dictionary