twelveth和twelfth的区别

twelfth与twelve的区别在于：前者是序数词，即表示顺序的数词，后者是单纯的数词。用汉语表达就是：前者叫做“第十二”，后者则是“十二”。

例句：

Conclusions of the study still has important inspirations for China, which has gone through over thirty years of attracting-investment activities with achievements and problems, to make more scientific and rational FDI policy in the "Twelveth Five-Year" new era.

这些研究结论对于已经走过三十多年引资之路、成就与问题并存的中国在十二五新时期制定更加科学合理的引资政策仍然具有重要的启示意义。

They are going to play "Twelfth Night" next week.

下周，他们将演出“第十二夜”。

At the twelfth stroke, we welcomed in the New Year.

时钟正在敲十二点时，我们迎来了新年。