英语语法分析

It is not strictly a coal or it can be termed as the most immatured coal.

它不是严格意义上的煤，也可以说是最具immatured煤炭深。

Objective: To observe the results of treating the injured displaced immatured permanent front teeth.

前言：目的：观察年轻恒前牙外伤脱位的治疗效果。