twenty-first什么意思？

twenty-first的音标：twenty-first的英式发音音标为：['twenti: fə:st]twenty-first的美式发音音标为：['twɛnti fɚst]...

Here are ideas people have about life in the twenty - first century.这儿是 二十一 世纪人们对生活的一些想法.The use of integrated pest management will expand in the twenty - first century.在二十一世纪,害虫综合治理的应用将扩大.And the number of extinctions c...