1 ADJ 第三的;第三位的;第三阶段的 Tertiary means third in order, third in importance, or at a third stage of development. 第三的;第三位的;第三阶段的 [formal]
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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。
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...the complementary tertiary colours, russet and olive green.
互补的三次色—赤褐色和橄榄绿
2 ADJ [ADJ n] 高等（教育） Tertiary education is education at university or college level. 高等（教育） [British]
in AM, use 美国英语用 higher education
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