论文部分内容阅读
地球生物的历史地球已有４６亿年历史。如果把４６亿年比作一天，生物的演化会变得十分有趣。０时：地球诞生１４时：单细胞出现，地球上第一次拥有生命。２０时：双细胞孕育。２１时２０分：海洋里出现了三叶虫。２１时５０分：节肢动物生活在地球上。２２时；脊椎动物爬...
Earth’s history has 4.6 billion years of history. If we compare 4.6 billion years to one day, the evolution of biology will become very interesting. 0 o’clock: The birth of the earth at 14 o’clock: single cells appear, and for the first time in life on earth. 20 o’clock: Two-cell incubation. At 21:20: trilobites appeared in the ocean. 21:50: Arthropods live on Earth. 22 o’clock; vertebrates crawling...