21号英文
例句
Ocean is very important in twenty first century.
21世纪是海洋世纪，中国是一个海洋大国。
一日到三十日的缩写1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th, 15th, 16th, 17th,18th, 19th, 20th, 21st, 22nd, 23rd, 24th, 25th, 26th, 27th, 28th, 29th, 30th.
月份英文简写英文全称如下
1、一月Jan.January
2、二月Feb.February
3、三月Mar.March
4、四月Apr.April
5、五月May.May
6、六月Jun.June
7、七月Jul.July
8、八月Aug.August
9、九月Sept.September
10、十月Oct.October
11、十一月Nov.November
12、十二月Dec.December