the Tertiary period

基本解釋

This 65.5-million-year old layer of Earth separates fossils of the Cretaceous period from those of the Tertiary period.
他們發(fā)現(xiàn)當(dāng)時(shí)被稱為K-T邊界的沉積層中含有濃度極高的銥元素，這個(gè)具有6,550萬年歷史的古老地層將白堊紀(jì)的化石與第三紀(jì)的化石分離開來。
huzhangao.blog.163.com
There are three main types synthetic soil conditioner available, derived from petroleum chemicals, the Tertiary period minerals and organic materials.
人工合成土壤結(jié)構(gòu)改良劑可分為石油化工產(chǎn)品、第三紀(jì)礦物產(chǎn)品以及無機(jī)物與有機(jī)物相結(jié)合產(chǎn)品共三類。
The oil originated more than four kilometers (two and a half miles) below the ocean floor, in rock layers that formed millions of years ago, during the Tertiary period.
這些原油發(fā)源于位于海底下方四千米深處形成于幾百萬年前第三極時(shí)期的的巖層，那里巖漿滾滾。

Enrolment in pre-primary, secondary and tertiary education has also grown by more than 60% during the same period.
UNESCO: EDUCATION