re
re — 介系詞
1. used in formal letters, emails, and official documents to introduce the topic or
關於；事由
用於正式信件主旨，引出主題
used in formal letters, emails, and official documents to introduce the topic or subject that the message is about.
Re your application for the marketing role, we would like to invite you for an interview next week.
關於您應徵行銷職位一事，我們想邀請您下週前來面試。
re + noun phrase in formal letter opening
The envelope was marked 'Re: Account Number 4492' in bold letters on the front.
信封正面用粗體字標示了「事由：帳戶編號 4492」。
subject line format in business correspondence
Re our telephone conversation this morning, I confirm that the meeting date has been changed to Friday.
關於我們今早的電話交談，我確認會議日期已改為星期五。
All correspondence must include 'Re: Estate of the late Mrs. Okonkwo' at the top of the letter.
所有信件都必須在頂端寫明「事由：Okonkwo 夫人遺產案」。
The legal document began with 'Re: Property Dispute between Chen and Liu' to state its purpose.
法律文件的開頭寫著「事由：Chen 與 Liu 之間的財產糾紛」，以表明文件目的。
- regarding
equally formal but more common in spoken English
- concerning
slightly more formal, used in both writing and speech
- about
neutral and widely used; less formal than 're'
文法句型
re + noun phrase
用法筆記
Frequently used in letter headings, memo subject lines, and legal documents. The topic noun phrase follows directly after 're' without a preposition.
常見錯誤
2. placed at the front of an email subject header when your message answers a previ
回覆
電郵主旨中用於表示回覆前信
placed at the front of an email subject header when your message answers a previous message that someone sent you.
When Dario hit reply, the email system automatically added 'Re:' before the original subject.
Dario 按下回覆時，郵件系統自動在原始主旨前加上了「Re:」。
automatic addition by email client
Naoko's inbox showed twelve messages all starting with 'Re: Budget Meeting'.
Naoko 的收件匣裡有十二封以「Re: 預算會議」開頭的信件。
Please remove the 'Re:' tag from the subject line when you start a completely new topic.
當你開始討論全新話題時，請刪除主旨中的「Re:」標記。
The subject line 'Re: Re: Office Party' appeared after several people had replied to the same thread.
經過幾個人來回回覆同一串郵件後，主旨變成了「Re: Re: 辦公室派對」。
Gabriela noticed the subject still said 'Re: Old Project' even though the discussion had moved on to a different matter.
Gabriela 發現主旨仍寫著「Re: 舊專案」，但討論內容早已轉到別的事情上了。
文法句型
Re: + original subject line
用法筆記
Derived from Latin 'rēs' (thing, matter) via the same origin as the REGARDING sense, but now functions as a standard email convention. Some email clients display 'Re:' even when the message is forwarded rather than replied to.
常見錯誤
re — 名詞
1. the second pitch in the solfège singing scale, chanted or spoken in the pattern
雷（音名）
全音階唱名中的第二個音
the second pitch in the solfège singing scale, chanted or spoken in the pattern do, re, mi, fa, so, la, ti.
The choir warmed up by singing do, re, mi, fa, so up and down the scale.
合唱團以 do、re、mi、fa、so 上下音階作為暖聲練習。
sol-fa scale sequence
In the key of C major, the note re corresponds to the pitch D on the piano.
在 C 大調中，re 這個音對應鋼琴上的 D 音。
re corresponds to D in C major
Naoko practiced holding the re for four full counts during the vocal exercise.
Naoko 在發聲練習中練習將 re 這個音延續四拍。
The children's song began on re and moved up to mi in the second bar.
這首兒童歌曲從 re 開始，在第二小節移到 mi。
Asher marked every re in his sheet music with a small dot to help with sight-singing.
Asher 在樂譜上每個 re 音旁標上小點，幫助自己視唱。
- supertonic
technical music theory term for the second scale degree
文法句型
the note re
sing re
用法筆記
Comes from the medieval hymn 'Ut queant laxis' where each phrase began on a successive note of the scale. The syllable 're' was taken from the line 'resonare fibris'.
常見錯誤
re — 字首
1. added to verbs to show that an action is performed once more, especially when th
再；重新
加在動詞前表示再次進行
added to verbs to show that an action is performed once more, especially when the first attempt was not successful or the result has changed.
The teacher told Christopher to redo the math problems that he had answered incorrectly.
老師叫 Christopher 重做他答錯的數學題。
re- attached to 'do' = do again
The city council voted to rebuild the school after the earthquake damaged the old building.
市議會投票決定重建在地震中受損的學校。
re- attached to 'build' = build again
Élise decided to reconsider her career options before signing the contract.
Élise 決定在簽約前重新考慮自己的職業選擇。
The company will reopen the store next month after completing the renovations.
公司將在裝修完成後於下個月重新開張。
The journalist had to rewrite the article because the editor found several factual errors.
記者不得不重寫那篇文章，因為編輯發現了幾處事實錯誤。
文法句型
re- + verb
用法筆記
When the base word begins with 'e', a hyphen is often added for clarity: re-enter, re-elect, re-examine. Many common re- words (reply, receive, require) are NOT formed with this prefix — they come from Latin and the 're-' is part of the root, not a prefix added to an existing English word.
常見錯誤
2. added to verbs to indicate that something moves back to an earlier place, condit
返回；恢復
加在詞前表示回到原有狀態
added to verbs to indicate that something moves back to an earlier place, condition, or owner, often restoring what was lost or moved.
The library asked Mark to return the overdue books before the end of the week.
圖書館請 Mark 在週末前歸還逾期未還的書。
re- + 'turn' = turn back, give back
After the blackout, workers worked through the night to restore power to the neighborhood.
停電之後，工人們徹夜工作，恢復了社區的電力供應。
re- + 'store' = store again, bring back
The store will refund your money if you are not satisfied with the purchase.
如果你對購買的商品不滿意，商店會退款給你。
The museum hired a specialist to restore the old paintings to their original condition.
博物館聘請了一位專家，將古老畫作修復到原本的狀態。
The government promised to repay the loan with interest over ten years.
政府承諾在十年內連本帶利償還貸款。
文法句型
re- + verb
用法筆記
This sense often overlaps with the DO AGAIN sense — 'restore' could mean 'store again' (original state) while 'reopen' means 'open again' (repeat action). Context determines which meaning is intended. The hyphen rule (re-enter, re-elect, re-examine) applies to this sense as well.
常見錯誤
re — 符號
1. the chemical symbol for rhenium, a hard, silvery-white metal element with a very
錸
化學元素錸的符號
the chemical symbol for rhenium, a hard, silvery-white metal element with a very high melting point, used in high-temperature alloys and catalysts.
On the periodic table, the symbol Re stands for the element rhenium.
在週期表上，符號 Re 代表元素錸。
Re as periodic table symbol
Superalloys containing Re are used in jet engine turbine blades because of their heat resistance.
含有 Re 的超級合金因其耐熱性而被用於噴射引擎渦輪葉片。
The chemistry student looked up the atomic mass of Re before starting the experiment.
化學系學生在開始實驗前查詢了 Re 的原子量。
Rhenium (Re) has one of the highest melting points of any metal, exceeding 3,000 degrees Celsius.
錸（Re）的熔點超過攝氏三千度，是所有金屬中最高的之一。
用法筆記
Always capitalized when used as a chemical symbol. Rhenium is one of the rarest elements in the Earth's crust, and its symbol 'Re' is primarily used in scientific and industrial contexts.