Boring Billion

短语

词形变化

the Boring Billion

释义与例句

name
  1. 1.

    The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic.

    地质

词源

From boring + billion. From the remarkably stable environment of the time, over a period of 1 billion years, from climate, weather, geology, tectonic shifting, lifeforms.

来源：wiktionary