30（三十[san shi]）是29与31之间的自然数、正整数，是一个偶数，也是一个有理数。

30用英文怎么写？

Thirty

英 [ˈθɜːti] 美 [ˈθɜːrti]

num.三十;三十几;三十年代

复数： thirties 派生词： thirtieth ordinal number n.

thirty的双语例句

1.There are thirty households in the village. 

全村共三十户。

2.She's well over thirty this year. 

她今年已经三十好几了。

3.He lived abroad for thirty years. 

他在国外侨居了三十年。

4.He's a little over thirty. 

他三十出头了。

5.All our stocks have been marked down thirty percent. 

我们所有的存货已减价百分之三十。

thirty的常见句型

用作数词 (num.)

1.I'll be thirty next year.

明年我就满三十岁了。

2.I get up at six thirty every morning.

我每天早上六点半起床。

thirty的词汇搭配

thirty-second note 三十二分音符

minus thirty 减两分 

thirty all 二平 

thirty love 二比零 

Thirty Year's War 三十年战争

plus thirty 让给弱方加两分

demisemiquaver 三十二分音符

thirty-twomo 三十二开纸

thirty的真题例句

1.But even if people are able to economically support a retirement at 65, over thirty years of potential inactivity is harmful to cognitive (认知的) and emotional vitality.

2019年6月四级真题（套）阅读 Section B

2.Thirty years after he imagined the city, Park's baby is close to 70 percent built, with 36.

2019年12月四级真题（套）阅读 Section B

3.The path to dawson was covered with thirty feet of wet snow that could fall without warming.

2018年高考英语全国卷3 阅读理解 阅读B 原文

4.The site now has more than one million members in more than one hundred thirty-five countries.

2016年高考英语全国卷2 阅读理解 阅读C 原文

5.Protests have erupted over construction of the Thirty Meter Telescope, a giant observatory that promises to revolutionize humanity's view of the cosmos.

2017年考研真题（英语一）阅读理解 Section Ⅱ

6.Thirty years ago, it would have been inconceivable to have imagined a ban on smoking in the workplace or in pubs, and yet that is what we have now.

2011年考研真题（英语二）阅读理解 Section Ⅱ