tertiary

第三纪；第三修道会会员；第三级教士中释n

第三的；第三位的；三代的英释中释adjthird in place, degree, or order

1 tertiary industry,第三产业

2 tertiary education,高等教育，大学教育

3 tertiary amine,[化]叔胺；三级胺

4 tertiary recovery,三次开采；强化采油

5 tertiary period,[地质]第三纪

6 tertiary treatment,三级处理

7 tertiary sector,第三产业（服务业）；第三产业部门

8 tertiary structure,[化]三级结构

9 tertiary butyl alcohol,叔丁醇；第三丁基醇

1 He must have come to know those philosophers through secondary or tertiary sources..他一定是通过第二手或第三手资料了解那些哲学家的。