A&nb sp;rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a
A&nb sp;rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a
一个颇为相似的分化过程已经导致专业的地质学家走到一起组成一到两个全国性的专科学术社团，而业余地质爱好者们倾向于要么仍留在地方社团，要么也以另一种方式组成全国性机构。