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Eocene

['i:əusi:n]

解釋/意思:

(noun.) from 58 million to 40 million years ago; presence of modern mammals.

安娜校對--From WordNet

解釋/意思:

(a.) Pertaining to the first in time of the three subdivisions into which the Tertiary formation is divided by geologists, and alluding to the approximation in its life to that of the present era; as, Eocene deposits.

(n.) The Eocene formation.

錄入:威廉姆斯

解釋/意思:

adj. (geol.) first in time of the three subdivisions of the Tertiary formation.

校對:莎娜

例句/造句/用法:

錄入:厄普顿

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