volcanologists

She studied rocks for years and finally became a volcanologist.

用法提示：名词 volcanologist 在句中作表语，表示她从事火山研究的职业身份。

The volcanologists set up their equipment near the crater to record the tremors.

用法提示：名词复数 volcanologists 作主语，指一群从事火山研究的人。

As a volcanologist, he often travels to remote islands to study active volcanoes.

用法提示：名词 volcanologist 与 as 连用，说明他的职业身份是火山学家。