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1·Today is the fifth (of May).

今天是（五月）五号。《牛津词典》

2·It's the fifth time that I've been to America.

这是我第五次去美国了。《牛津词典》

3·Indonesia is the fifth most populous country in the world.

印度尼西亚是世界上人口第五大国。《柯林斯英汉双解大词典》

4·Enron Chairman and CEO Kenneth Lay took the Fifth Amendment during his congressional testimony.

安然董事会主席兼总监肯尼迪·雷在国会听证会上使用了修正案第五条，拒绝回答问题。《柯林斯英汉双解大词典》

5·In the fifth year, a small sprout came out.

第五年的时候，长出了一个小芽。

6·It is the fifth generation of mobile network technology.

5G 是指第五代移动通信技术。

7·China became the fifth country to launch a satellite independently.

中国成为第五个独立发射卫星的国家。

8·May is the fifth month of the year in the Western calendar.

阳历的五月是一年中的第五个月。

9·The Fifth Symphony was used in many other music forms by Beethoven.

第五交响曲在贝多芬的其他许多音乐形式中使用。

10·May is the fifth month of the year. It's a very pleasant month.

五月是一年中的第五个月。这是一个非常愉快的月份。