thirty

1.數詞A1

釋義

三十

數字30

the number 30, used when counting things, stating ages, or giving measurements such as temperature or distance

例句

Yan invited thirty classmates to his birthday party at the park.

Yan 邀請了三十位同學到公園參加他的生日派對。

The temperature outside reached thirty degrees by noon today.

到中午時，室外溫度已經達到攝氏三十度。

collocation: thirty degrees (temperature)

常見錯誤

❌She is thirty years.

✅She is thirty years old.

💡When stating age, include 'old' or simply say 'She is thirty.' without 'years'.

1.名詞A1

釋義

三十（數值）

視為名稱或數字的30

the number 30 when thought of as a name, written figure, or mathematical value, rather than as a quantity of things

例句

Thirty is my lucky number, so I chose seat thirty on the train.

三十是我的幸運數字，所以我在火車上選了三十號座位。

thirty used as a noun subject

Write the number thirty at the top of your answer sheet.

在答案卷的最上方寫上數字三十。

用法筆記

Unlike the number sense, this noun form can take determiners (the thirty, a thirty) and can be plural (thirties) when referring to multiple instances of the figure.

常見錯誤

❌I have thirty of apples.

✅I have thirty apples.

💡When counting things, use thirty as a determiner, not a noun followed by 'of.'

2.名詞A2

釋義

三十至三十九

30到39歲或30到39年的時期

the range of numbers from 30 up to 39, used especially to describe a person's age or the years in a century

例句

Élise is in her thirties and works as a nurse at the city hospital.

Élise 三十多歲，在市中心醫院擔任護理師。

in + possessive + thirties (age range)

The temperature in July often stays in the low thirties in southern Spain.

西班牙南部七月的氣溫經常在攝氏三十度出頭。

文法句型

in + possessive + thirties

the + year + thirties

用法筆記

For age, always use the plural form 'thirties' with a possessive determiner (my, his, her, their): 'in his thirties.' For temperature or historical decades, simply use 'the thirties' without a possessive. Common modifiers include 'early,' 'mid,' and 'late.'

常見錯誤

❌She is in thirty.

✅She is in her thirties.

💡Age ranges always use the plural form with a possessive determiner.

❌He is thirty's old.

✅He is thirty years old.

💡Do not use a possessive form for exact age.

3.名詞C2

釋義

結束記號

新聞稿件完稿的傳統標記

a traditional mark, often written as the figure 30 inside dashes (—30—), that reporters and editors use to show that a news article or story is finished and ready to be published

例句

The reporter typed —30— at the bottom of the article to mark the end.

記者在文章底部打上 —30— 的記號，表示稿件結束。

—30— symbol for story completion

In old newsrooms, editors expected writers to put thirty at the end of each story.

在老派的新聞編輯室裡，主編要求撰稿人在每篇報導結尾寫上三十。

用法筆記

This convention is largely historical. Most modern newsrooms use digital publishing systems and no longer write —30— on articles. Learners may encounter it in books or films about journalism.

4.名詞B1

釋義

三十（分）

網球一局中的第二分

the second point that a player or team wins in one game of tennis, worth 30 points in the traditional scoring system

例句

The score is thirty–love after Rachid won the first two points.

Rachid 拿下前兩分之後，比數來到三十比零。

thirty–love (tennis scoring)

Quinn served well and quickly reached thirty in the third game.

Quinn 發球表現出色，在第三局很快取得三十分。

文法句型

thirty + love / fifteen / forty

用法筆記

In tennis, 'thirty' is always spoken as a word, not read as a numeral. It is never the actual number 30 — it is simply the name for the second point. After thirty comes forty (the third point), and then game.

常見錯誤

❌The score is 30–0.' (in spoken tennis)

✅The score is thirty

💡love.' — Tennis scores are always said as words, not numbers, during play.

thirty

thirty — 數詞

1. the number 30, used when counting things, stating ages, or giving measurements s

常見錯誤

thirty — 名詞

1. the number 30 when thought of as a name, written figure, or mathematical value,

用法筆記

常見錯誤

2. the range of numbers from 30 up to 39, used especially to describe a person's ag

文法句型

用法筆記

常見錯誤

3. a traditional mark, often written as the figure 30 inside dashes (—30—), that re

用法筆記

4. the second point that a player or team wins in one game of tennis, worth 30 poin

文法句型

用法筆記

常見錯誤