century前加数词时century是否变复数

century前加数词时century是否变复数 century 21世纪 是twenty first century 还是 twenty one century 还是别的什么的?我看到名为21st century 的报纸,中的21st是不是应该按序数词的读法读成twenty first century? century前加数词什么形势How many teachers are there in your school ?（ ）but I'm not sure . 为什么是one hundred ，为什么不是hundred或者hundreds再或者hundreds of？ In the（ ） century , there will be more inventions . Century Park前面加the吗? century A. One h_____ year is a century(世纪）用适当的数词完成 in 18th century 要不要加the变成in the 18th century the twentieth century是名词短语? 21century是日刊还是周刊? 英语翻译是in early 14 century ,还是in the early 14 century 21世纪用英文怎么说?是21st century 还是the 21st century? 21st Century Breakdown century 读什么 century怎么读 set century to Century square 怎么读 century什么意思