他在關(guān)于地質(zhì)學(xué)的報(bào)告中, 也涉及氣候問題.In his lecture on geology, he touched on the subject of climate.主修地質(zhì)學(xué)的學(xué)生要選修地質(zhì)學(xué)或地理課程.Concentrators in geological sciences elect either geology or geography.他主修地質(zhì)學(xué).He majors in geology....