a canary
金丝雀常作为宠物鸟饲养。
She keeps a canary as a pet.
她养了一只金丝雀作为宠物。
淡黄色；嫩黄色；试验品；试验对象；线人；告密者；女歌手；诺维奇城足球俱乐部相关人员（球迷、球员、教练等）
a small yellow songbird, especially one of the finch family native to the Canary Islands; any of various small birds that are mostly yellow
金丝雀
A small, usually yellow, finch (genus Serinus), a songbird native to the Canary Islands.
与诺维奇城足球俱乐部有关的人,如球迷、球员、教练等
Someone connected with Norwich City Football Club, as a fan, player, coach etc.
为警方充当线人或诱饵的人
someone acting as an informer or decoy for the police
黄色小鸟
Any of various small birds of different countries, most of which are largely yellow in colour.
女歌手
a female singer
淡黄色
A light, slightly greenish, yellow colour.
略带绿色的中等黄色
a moderate yellow with a greenish tinge
Any test subject, especially an inadvertent or unwilling one. (From the mining practice of using canaries to detect dangerous gases.)
A value placed in memory such that it will be the first data corrupted by a buffer overflow, allowing the program to identify and recover from it.
A change that is tested by being rolled out first to a subset of machines or users before rolling out to all.
A light, sweet, white wine from the Canary Islands.
A lively dance, possibly of Spanish origin (also called canaries).
A previously-issued ticket, retained by a ticket-seller, conductor or driver and resold to a subsequent passenger as a means of defrauding the transport company.
My grandmother keeps a canary in a cage.
我的祖母在笼子里养了一只金丝雀。
用法提示：此处“canary”作为可数名词，指一种小型黄色鸣禽。
The canary sang beautifully this morning.
今天早上那只金丝雀唱得很动听。
用法提示：“canary”作主语，指代一只金丝雀。
The pet store had several canaries for sale.
宠物店有几只金丝雀待售。
用法提示：“canaries”是“canary”的复数形式，指多只金丝雀。
金丝雀常作为宠物鸟饲养。
She keeps a canary as a pet.
她养了一只金丝雀作为宠物。
canary yellow 指淡黄色。
The dress is a bright canary yellow.
这条裙子是明亮的淡黄色。
该习语比喻早期预警信号。
Rising temperatures are a canary in the coal mine for climate change.
气温上升是气候变化的预警信号。
较正式中性；canary 为俚语，含贬义，常指罪犯同伙向警方告发。
非正式口语，比 canary 常用，也可指告发朋友或同伴的小错。
多用于犯罪语境，指长期供消息者；canary 强调临时作证或揭发同伙。
贬义强烈，指背叛团伙向当局告密，口语常用；canary 语气更俚语化，不如 rat 普遍。
发音拼写相近，但意思完全不同（树冠 vs 鸟/颜色）
都是宠物鸟，但品种不同（金丝雀vs鹦鹉）
煤矿中的金丝雀；早期预警信号
The sudden drop in sales was a canary in a coal mine for the company.
销售额的突然下降对这家公司来说是一个早期预警信号。
像金丝雀一样歌唱；（指被捕后）全部招供
As soon as he was caught, he sang like a canary.
他一被抓就全盘招供了。
淡黄色；金丝雀黄
The walls were painted a bright canary yellow.
墙壁被漆成明亮的淡黄色。
宠物金丝雀
His pet canary sings every morning.
他的宠物金丝雀每天早晨都会唱歌。
Canary + Islands
canary + yellow
canary + bird
canary + seed
canary + in + a + coal + mine
金丝雀属于雀科，与其同属一大类小型鸣禽。
金丝雀以鸣叫闻名，是常见的笼养鸣禽。
金丝雀常被养在鸟笼中，供观赏和听鸣。
金丝雀是常见的宠物鸟之一。
金丝雀最典型的羽毛颜色是黄色，因而有“金丝雀黄”的说法。
矿井中的金丝雀；预警信号
Falling test scores are often a canary in a coal mine for future academic problems.
成绩下降往往是未来学业问题的预警信号。
像金丝雀一样歌唱；告密，招供
He knew the secret, and after hours of questioning he sang like a canary.
他知道秘密，经过几小时的审问后，他全招了。
像吞了金丝雀的猫；自鸣得意，得意洋洋
She looked like the cat that swallowed the canary after she heard the good news.
听到这个好消息后，她一副得意洋洋的样子。
煤矿里的金丝雀。
Rising sea levels are a canary in the coal mine for climate change.
海平面上升就像煤矿里的金丝雀，是气候变化的预警信号。
Dictionary facts from ECDICT, WIKTIONARY.