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Epoch

['iːpɒk;'epɒk] or ['ɛpək]

解釋/意思:

(noun.) a unit of geological time that is a subdivision of a period and is itself divided into ages.

(noun.) (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded.

手打:内蒂--From WordNet

解釋/意思:

(n.) A fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time marked by an event of great subsequent influence; as, the epoch of the creation; the birth of Christ was the epoch which gave rise to the Christian era.

(n.) A period of time, longer or shorter, remarkable for events of great subsequent influence; a memorable period; as, the epoch of maritime discovery, or of the Reformation.

(n.) A division of time characterized by the prevalence of similar conditions of the earth; commonly a minor division or part of a period.

(n.) The date at which a planet or comet has a longitude or position.

(n.) An arbitrary fixed date, for which the elements used in computing the place of a planet, or other heavenly body, at any other date, are given; as, the epoch of Mars; lunar elements for the epoch March 1st, 1860.

约翰校對

同義詞及近義詞:

n. Period, date, era, age, point or period of time (remarkable for some event).

哈恩編輯

解釋/意思:

n. a point of time fixed or made remarkable by some great event from which dates are reckoned: a period remarkable for important events: (astron.) the mean heliocentric longitude of a planet in its orbit at any given time.—adjs. Ep′ochal; Ep′och-mā′king.—Make Mark an epoch to begin an important era.

錄入:劳伦斯

例句/造句/用法:

阿尔玛編輯

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