They are in diametric ( al ) opposition to each other.他们彼此 针锋相对....

adj.直径的，正相反的...

diametric的音标：diametric的英式发音音标为：[ˌdaɪə'metrɪk]diametric的美式发音音标为：[ˌdaɪə'metrɪk]...