1
the thirteenth [noun]
用于表示顺序中的第十三个。
He finished in the thirteenth position.
他获得了第十三名。
第十三
先理解核心含义，再看它在真实句子里的用法。
第十三
position 13 in a countable series of things
He finished in the thirteenth position.
他获得了第十三名。
排在第十三位的人或物。
The person or thing in the thirteenth position.
十三分之一。
One of thirteen equal parts of a whole.
八度加六度的音程。
The interval comprising an octave and a sixth.
一个月的第十三天。
The thirteenth day of a month.
My thirteenth birthday was unforgettable.
我的十三岁生日令人难忘。
The office is on the thirteenth floor.
办公室在十三楼。
She finished thirteenth in the race.
她在比赛中获得第十三名。
用于表示顺序中的第十三个。
He finished in the thirteenth position.
他获得了第十三名。
分数用法，意为‘十三分之一’。
A thirteenth of the cake is missing.
蛋糕的十三分之一不见了。
用于表示具体日期。
The meeting is on the thirteenth of May.
会议在5月13日举行。
Not this
He finished in thirteen place.
Use this
He finished in thirteenth place.
在表示顺序时应用序数词thirteenth，而非基数词thirteen。
Not this
Today is the thirteen of April.
Use this
Today is the thirteenth of April.
日期表达中需用序数词thirteenth，而不用基数词thirteen。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
十三岁生日
She celebrated her thirteenth birthday with a big party.
她办了一个大型派对来庆祝她的十三岁生日。
十三世纪
The castle was built in the thirteenth century.
这座城堡建于十三世纪。
十三楼
Many hotels skip the thirteenth floor due to superstition.
许多酒店因迷信而跳过十三楼。
第十三修正案
The Thirteenth Amendment abolished slavery in the United States.
第十三修正案废除了美国的奴隶制。
十三周年纪念
They are planning a trip for their thirteenth wedding anniversary.
他们正在计划十三周年结婚纪念日的旅行。
第十三名
He finished in thirteenth position in the race.
他在比赛中获得第十三名。
Use thirteenth naturally, then get feedback on meaning, tone, grammar, and phrasing.
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thirteenth 由 thirteen 加 th 构成，对应中文‘第十三’。
ordinal numbers (dates, rankings, floors); neutral register; 通常用于表示顺序，适用于多种正式和非正式场合。
序数词，作为名词时常用定冠词the
Dictionary facts from ECDICT, WIKTIONARY.