co
co — 字首
1. a prefix added to the start of a word to show that two or more people do somethi
共同；聯合
表示一起做或共同擔任的前綴
a prefix added to the start of a word to show that two or more people do something together, or that someone shares a role or position with another person
Tuan co-founded a language school with two old classmates after they graduated.
Tuan 畢業後與兩位老同學共同創辦了一所語言學校。
co- + verb: co-found (start something together)
The co-authors of the science paper shared the prize money equally between them.
這篇科學論文的共同作者平分了獎金。
co- + noun: co-author (joint creator)
Kofi and his uncle are co-owners of a small carpentry workshop in Kumasi.
Kofi 和他的叔叔是 Kumasi 一家小型木工坊的共同所有人。
Ravindra was named co-chair of the neighbourhood safety group last Tuesday.
Ravindra 上週二被任命為社區安全小組的共同主席。
The two film studios agreed to co-produce a documentary about sea turtles.
兩家電影工作室同意共同製作一部關於海龜的紀錄片。
用法筆記
Added to nouns, verbs, and adjectives. Most often used with nouns that name a role or job (co-pilot, co-star, co-director). The hyphen is usually kept in British English; American English sometimes writes the word without it.
常見錯誤
co — 名詞
1. a written short form of the word 'company', placed after the name of a business
公司（縮寫）
公司一詞的書面縮寫，用於商業名稱
a written short form of the word 'company', placed after the name of a business
Liang started working at Norton & Co., a small accounting firm, last month.
Liang 上個月開始在 Norton & Co. 這家小型會計師事務所工作。
& Co. in formal business names
The letter was addressed to Patel & Co., 42 High Street, Leicester.
這封信的收件地址是 Leicester High Street 42 號的 Patel & Co.。
Emma's grandfather founded Brown & Co. back in 1963, selling farming tools.
Emma 的祖父在 1963 年創立了 Brown & Co.，當時販售農具。
Cole got a job offer from a law firm called Dawson & Co. this morning.
Cole 今天早上收到了一家名為 Dawson & Co. 律師事務所的工作邀請。
The shop sign read 'H. Martin & Co. — Fine Tailoring Since 1887'.
商店招牌上寫著「H. Martin & Co.——自 1887 年以來的精緻裁縫」。
用法筆記
Always written with a capital C followed by a period. Used mainly in formal or traditional business names, especially in the UK. Not used as a standalone word for any company.
常見錯誤
2. a written short form of the word 'county', placed before the name of a county, u
郡（縮寫）
郡的書面縮寫，用於愛爾蘭及英國地名
a written short form of the word 'county', placed before the name of a county, used mainly in Ireland and parts of the UK
Madison's relatives moved to Co. Clare, a quiet area on Ireland's west coast.
Madison 的親戚搬到了愛爾蘭西海岸一個寧靜的地區 Co. Clare。
Co. + county name in Irish addresses
The road sign read 'Co. Durham' as they drove north from Yorkshire.
他們從 Yorkshire 向北行駛時，路標上寫著「Co. Durham」。
Hugo traced his ancestors back to a tiny village in Co. Cork, Ireland.
Hugo 將他的祖先追溯到愛爾蘭 Co. Cork 的一個小村莊。
The old census records for Co. Kerry were stored in the national archive in Dublin.
Co. Kerry 的舊人口普查記錄存放在都柏林的國家檔案館中。
A postcard arrived from Co. Galway, where the family was spending the summer.
一張明信片從 Co. Galway 寄來，他們一家人正在那裡度暑假。
用法筆記
Always written with a capital C followed by a period. Most commonly seen in Irish place names (Co. Dublin, Co. Cork). Not used for US or Canadian counties.
常見錯誤
3. a short form for Commanding Officer, meaning the senior officer who leads a mili
指揮官
軍事單位最高指揮官的縮寫
a short form for Commanding Officer, meaning the senior officer who leads a military unit or base
The CO ordered all personnel to gather in the main hall by 0600 hours.
指揮官命令所有人員在早上六點前到大廳集合。
CO as subject followed by a military command verb
Karim received a formal commendation from the CO for his quick thinking during the drill.
Karim 因在演習中反應迅速而獲得指揮官的正式嘉獎。
The new CO introduced himself to every soldier in the unit last Monday.
新來的指揮官上週一向單位裡的每位士兵自我介紹。
A photograph of the former CO hung in the corridor outside the briefing room.
前任指揮官的照片掛在簡報室外面的走廊上。
The CO walked into the mess hall and the room fell completely silent.
指揮官走進食堂，整個房間頓時鴉雀無聲。
用法筆記
Always written in capital letters without periods (CO, not C.O.). Used in spoken military English as well as in writing — pronounced as the two letters 'C-O'.
常見錯誤
4. the two-letter postal code for the western American state of Colorado, placed af
科羅拉多州
美國科羅拉多州的郵政代碼
the two-letter postal code for the western American state of Colorado, placed after a city name in addresses and on forms
The package was sent to Boulder, CO, but took three extra days to arrive.
包裹寄往 Boulder CO，但多花了三天才送達。
City, CO format in US postal addresses
Lukas drove from Denver, CO, all the way to Santa Fe in a single day.
Lukas 從 Denver CO 一路開車到 Santa Fe，當天就到達了。
Noa wrote her address as 242 Pine Street, Aspen, CO 81611, on the form.
Noa 在表格上填寫的地址是 Aspen CO 81611，Pine Street 242 號。
The hiking festival will be held in Colorado Springs, CO, at the end of July.
健行節將於七月底在 Colorado Springs CO 舉行。
Felipe's cousin lives in a small mountain town near Durango, CO, in the southwest.
Felipe 的表親住在西南部 Durango CO 附近的一個山區小鎮。
用法筆記
Always written in capital letters without periods. One of the fifty US state codes used by the postal service. Do not confuse with CO meaning Commanding Officer.
常見錯誤
co — 符號
1. the chemical symbol for cobalt, a hard, shiny, silver-grey metal that is used in
鈷
化學元素鈷的符號
the chemical symbol for cobalt, a hard, shiny, silver-grey metal that is used in batteries, magnets, and strong metal mixtures
The phone battery contains Co, a metal mined mostly in central Africa.
手機電池含有 Co，這是一種主要在中非開採的金屬。
Co as chemical element symbol in scientific writing
Engineers are trying to make batteries that need less Co than current models.
工程師正試圖製造比現有型號使用更少 Co 的電池。
The supplement label listed Co among the trace minerals in each tablet.
營養補充品的標籤上將 Co 列為每錠中的微量礦物質之一。
The periodic table places Co between iron and nickel in the ninth group.
元素週期表將 Co 排在第九族，位於鐵和鎳之間。
Co is mixed with other metals to make aircraft parts that resist high heat.
Co 與其他金屬混合，用來製造耐高溫的飛機零件。
用法筆記
Always written with a capital C followed by a lowercase o. Used mainly in chemistry, materials science, and industry. Do not confuse with CO (Commanding Officer) or CO (Colorado).