In the 21st century st什么意思 .整个句子是什么意思!

In the 21st century st什么意思 .整个句子是什么意思! “21st Century”中的“st”是什么意思? 译The Role of English in the 21st Century in the 20st century对么? Is now the 21st century中文意思? the 21st century中st怎么读 21st Century Breakdown the 21st century is hte century of information t life in the 21st century will be different from life in the in my opinion life in the 21st century is much easier than（） Life in the 21st century will be different from life in th 求写一篇英语作文,名字《the advantages of living in the 21st century》