YTC的音标

This poper evaluated the reproducibility and validity of a food frequency questionnaire ( FFQ) used in a prospective study among Yunnan Tin Corporation ( YTC) miners.

本文研究了云锡矿工肺癌高危人群普查中所使用的食物频率问卷（FoodFrequencyQuestionnaire，FFQ）的信度和效度。

This paper is to give a systematic introduction to the technology used by YTC, including development pattern, minin method, hydromining equipment, hydraulic transport and auxiliary operations.

本文就云南锡业公司水力机械化开采从开拓形式、采矿方法、水采设备、水力运输以及辅助作业等方面作了较为系统的介绍。

Methods: Poisson regression models and the classification tree statistical model were applied to the analysis of data derived from a high risk cohort of lung cancer among YTC tin miners.

方法：应用Poisson回归和树型分类分析在云锡肺癌现场建立的高危人群队列资料。