单词详解
num. 第三十 (The thirtieth item in a series is the one that you count as number thirty.)
The thirtieth math question was the hardest. 第三十道数学题是最难的。
I arrived in the thirtieth position of the marathon. 我在马拉松比赛中跑了第三十名。
Before Steve Jobs celebrated his thirtieth birthday, he was a multimillionaire.
在史蒂夫·乔布斯庆祝30岁生日之前，他已经成为一个大富豪了。
It's September thirtieth-Thursday. 是9月30日，星期四。
Tomorrow is our thirtieth wedding anniversary. 明天是我们结婚30周年纪念日。
相关单词
基数词：thirty
缩写词：30th
