他在关于地质学的报告中, 也涉及气候问题.In his lecture on geology, he touched on the subject of climate.主修地质学的学生要选修地质学或地理课程.Concentrators in geological sciences elect either geology or geography.他主修地质学.He majors in geology....
火炉两边的凹室里是书架。In the alcoves on either side of the fire were bookshelves.我们把凹室分隔开作另一间卧室.We partitioned off the alcove to make another Bedroom.鸽笼式分类架,信件架,文件格小隔间或凹室, 如桌子里, 用来放文件;格架.A small compartment or recess , as in a des...