英语语法分析

Objective: To discuss the value of ct in pneumoconiosis diagnosis.

前言：目的：探讨CT在尘肺诊断中的价值。

These factors add difficulty to the early diagnoses of pneumoconiosis.

这些因素给尘肺的早期诊断带来了难度。

Since 1988, we have carried on the epidemiology investigations of pneumoconiosis.

1988年以来，郑州市持续开展了尘肺流行病学调查。