Seventeenth is how we say 17th in words — not the counting number seventeen (17), but the place in a line, a date, or a list. If you are the seventeenth person through the door, sixteen people came before you. We write it 17th.

Seventeenth這個字 is how we say 17th in words是用文字表達「第17」的方式， not the counting number seventeen (17)不是數數字的 seventeen(17)， but the place in a line, a date, or a list而是指排在隊伍、日期或名單中的順位。 If you are the seventeenth person through the door如果你是第十七個進門的人， sixteen people came before you表示前面已經有十六個人進去了。 We write it我們會寫成 17th。

You meet it on birthday cakes, in races, and in dates (“the seventeenth of May”). History books talk about the seventeenth century: that is the 1600s (1601–1700), though actually many students hear “seventeen” and think of the 1700s — that would be the eighteenth century.

You meet it on birthday cakes, in races, and in dates你會在生日蛋糕、比賽名次、還有日期上看到這個字 (“the seventeenth of May”)（像「the seventeenth of May」，五月十七日）。 History books talk about the seventeenth century歷史書會提到 the seventeenth century（十七世紀）: that is the 1600s (1601–1700)指的是1600年代(1601–1700)， though actually不過 many students hear “seventeen” and think of the 1700s很多學生一聽到 seventeen 就以為是1700年代 — that would be the eighteenth century那其實是 the eighteenth century(十八世紀)。

The word can also mean a thin slice of a whole: a seventeenth is one of seventeen equal parts.

The word can also mean a thin slice of a whole這個字也可以指整體中的一小份： a seventeenth is one of seventeen equal parts a seventeenth 就是十七等分之一。

It is an ordinary word; the only trick is not to mix it up with seventeen itself.

It is an ordinary word這是個很普通的字； the only trick is not to mix it up with seventeen itself唯一要注意的是別跟 seventeen 本身搞混。