SUFFIX
(加在以 4, 5, 6, 7, 8, 9, 10, 11, 12 或 13 結尾的數(shù)字后構成序數(shù)詞表示)“第…”
You add -th to numbers written in figures and ending in 4, 5, 6, 7, 8, 9, 10, 11, 12, or 13 in order to form ordinal numbers. These numbers are pronounced as if they were written as words. For example, 7th is pronounced the same as 'seventh', and 5th is pronounced the same as 'fifth'.
例句
...Thursday, 10th May, 1990.
1990年5月10日，星期四
...between Broadway and 6th Avenue.
百老匯和第六大道之間