thirteen

• 英文单词 thirteen 是数词而非形容词，表示数量十三。通常也可以指第十三个或十三号。

A number, not an adjective. It represents the cardinal number 13.

1. Number thirteenA1formal

   Being one more than twelve; the number 13.

   十三

   • There are thirteen students in the class.
   • She turned thirteen years old last week.
   • The clock struck thirteen, which was unusual.

• 数词，表示十二加一所得的整数，即13；也可指第十三个事物。

A noun referring to the cardinal number that is the sum of twelve and one.

1. Number 13A1formal

   The cardinal number that is the sum of twelve and one.

   十三

   • Thirteen is considered an unlucky number in some cultures.
   • She turned thirteen last week.
   • There are thirteen players on a rugby union team.

   同义词long dozenxiii

• 数词，表示十三这个数目；可作基数词、序数词或量词使用，十三在部分文化中与迷信相关。

The cardinal numeral representing the quantity of thirteen units; the thirteenth positive integer following twelve; a prime number frequently associated with cultural superstitions (often considered unlucky in Western traditions). Also functions as a noun (denoting the symbol, quantity, or group of thirteen), adjective/determiner (modifying nouns to indicate quantity), and pronoun (standing in for a plural noun phrase).

1. Cardinal numeral: the number 13A1formal

   Used to denote a quantity of thirteen persons or things; the thirteenth positive integer in the sequence of natural numbers; a prime number historically associated with superstition in Western cultures; represents a tredecuplet or thirteenfold quantity in counting, mathematics, and everyday usage.

   基数词：数字13

   • There are thirteen slices of pizza left.
   • She scored thirteen points in the tournament.
   • Thirteen plus thirteen equals twenty-six.
   • The military operation begins at thirteen hundred hours.
   • He caught thirteen fish during the weekend trip.

2. Noun: the number, symbol, or group of thirteenA2formal

   A noun referring to the cardinal number thirteen; the numeral symbol 13 or XIII; a set, collection, or group consisting of thirteen items; a playing card or domino displaying thirteen pips/values; in some contexts, refers to a team, ensemble, or cultural reference to the number thirteen.

   名词：数字、符号或十三个一组

   • The number thirteen is often skipped in elevator floor numbering.
   • Write the final answer as a thirteen.
   • A baker's dozen is sometimes casually called a thirteen.
   • She played the thirteen of clubs in the extended deck variant.
   • In numerology, thirteen is analyzed for its spiritual symbolism.

3. Adjective/Determiner: amounting to thirteenA1formal

   Used attributively before a noun to indicate that the quantity or number of the noun is thirteen; modifies plural countable nouns to specify exact quantity.

   形容词/限定词：数量为十三的

   • They booked a thirteen-day hiking expedition.
   • We need thirteen additional volunteers for the charity run.
   • The formula requires thirteen milliliters of solvent.
   • She achieved thirteen consecutive perfect scores.
   • Thirteen international agencies supported the initiative.

4. Pronoun: thirteen people or things (plural)B1formal

   Used as a pronoun to refer to thirteen previously mentioned or understood persons or things; takes plural verb agreement.

   代词：十三个（人或物）

   • Sixty applied, but only thirteen were accepted into the program.
   • I invited thirty colleagues; thirteen confirmed their attendance.
   • How many seats should we reserve? — Thirteen will be ideal.
   • Several startups pitched, but thirteen received seed funding.
   • Of the manuscripts reviewed, thirteen were selected for publication.