英文1号到31号日期缩写1日：first（1st）、2日：second（2nd）、3日：third（3rd）、4日：fourth（4th）、5日：fifth（5th）、6日：sixth（6th）、7日：seventh（7th）、8日：eighth（8th）、9日：ninth（9th）、10 Previous industrial revolutions liberated humankind from animal power, made mass production possible and brought digital capabilities to billions of people. This Fourth Industrial Revolution is, however, fundamentally different. It is characterized by a range of new technologies that are fusing the physical, digital and biological worlds, impacting all disciplines, economies and industries, and even challenging ideas about what it means to be human. 4th是序数词fourth的阿拉伯数字形式，表示第四的意思。 任何语言里都有序数词，俄语的序数词是由基数词的第二格形式的词干加上形容词词尾构成。 The Fourth Industrial Revolution has the potential to raise global income levels and improve the quality of life for populations around the world.
