I have to work on a mass of data.

我有一堆的资料要处理。

Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.

描述统计学就是这样一个工具，它对极其庞杂的数据进行描述、概括或删减，使其变成能为人理解的东西。

Ross wanted me to write an article about his work and on our way to the unhappy hunting grounds I took notes on a mass of data that he had accumulated in years of herpetological research.

罗斯要我写一篇关于他的工作的文章，在我们去那个不愉快的狩猎场的路上，我记下了他在多年的爬虫学研究中积累的大量数据。