单词例句
The geological timescale spans millions of years, from the formation of the Earth to the present day.
地质时间尺度跨越数百万年，从地球形成到现在。
In astronomy, the age of the universe is measured in billions of years.
在天文学中，宇宙的年龄以数十亿年为单位来衡量。
Human history is divided into different eras such as the Paleolithic, Neolithic, and Industrial periods.
人类历史被划分为不同的时代，如石器时代、新石器时代和工业时代。
The geological epoch of the Pleistocene lasted around 2.6 million years.
更新世地质时期大约持续了260万年。
A century is a period of 100 years, marking significant changes in technology, culture, and politics.
一个世纪是一百年的时间，标志着科技、文化和政治的重大变革。
The Roman Empire's decline took place over several centuries, spanning from the 2nd to the 5th century AD.
罗马帝国的衰落经历了几个世纪，从公元2世纪到5世纪。
The Cambrian explosion occurred approximately 541 million years ago, when a vast diversity of marine life emerged.
寒武纪大爆发发生在大约5.41亿年前，大量海洋生物开始出现。
The Ice Age cycle repeats roughly every 100,000 years, with glacial periods followed by interglacials.
冰河时代周期大约每10万年重复一次，由冰期和间冰期交替。
The Mesozoic Era, also known as the "Age of Dinosaurs," spanned 165 million years.
中生代，恐龙时代的名称，持续了1.65亿年。
The biological timescale ranges from the tiniest microorganisms to the lifespan of a human, which averages around 79 years.
生物时间尺度从最小的微生物到人类的平均寿命（约为79年）都有所涵盖。