Cambrian explosion

名词 n. 专有名词
中文释义
英 /ˈkam.bɹɪ.ən ɪkˈspləʊ.ʒən/    美 /ˈkæm.bɹi.ən ɛkˈsploʊ.ʒən/

英文释义

名词 n.
  1. The rapid appearance of anything. broadly
    — There has been a Cambrian explosion of cryptocurrencies.
专有名词
  1. The relatively rapid appearance, during the Cambrian Period around 541 million years ago, of most major animal phyla, as demonstrated in the fossil record.
    — Alternatively, if animals had a relatively long Precambrian history, why do so many kinds appear abruptly and more or less synchronously in the fossil record during Early Cambran time? Was there an external environmental factor that either prevented animals from becoming fossilizable (i.e., large muscular, and/or mineralized) prior to the beginning of the Cambrian, or did some biological or environmental event trigger the metazoan radiation? Hypotheses that have been advanced to explain these questions tend to focus on either an external environmental control on, or an internal property of, the organisms that participated in the Cambrian explosion.

词形变化

Cambrian explosions plural Cambrian explosions plural

词源

词源 1
Of unclear origin, inspired by George Gaylord Simpson's description of "explosive" evolution. The earliest known use is in a BSCS high school biology textbook written in 1961 under the direction of paleobotanist Wilson Steward.
词源 2
Of unclear origin, inspired by George Gaylord Simpson's description of "explosive" evolution. The earliest known use is in a BSCS high school biology textbook written in 1961 under the direction of paleobotanist Wilson Steward.
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