较常使用。在柯林斯辞典中， tertiary 是1万个最常用词之一。
英式英语: tertiary ADJECTIVE
Tertiary means third in order, third in importance, or at a third stage of development.
He must have come to know those philosophers through secondary or tertiary sources.
tertiary 的定义—— 柯林斯 英语词典
Collins Dictionaries for Schools
Our new online dictionaries for schools provide a safe and appropriate environment for children. And best of all it's ad free, so sign up now and start using at home or in the classroom.
Meme Ban, Heart Age & Collagin: September’s Words in the News
Catch up on the latest words in the news this September with Robert Groves.
Collins Reference Catalogue 2019
View our new 2019 reference catalogue. From dictionaries, phrasebooks, language learning, atlases and maps, general reference and puzzles, you'll be sure to find books that appeal to you.
Join the Collins community
All the latest wordy news, linguistic insights, offers and competitions every month.