顏色的慣用表達:blue boys are coming
1、between the devil and the deep blue sea
having only two very unpleasant choices between a rock and a hard place
只能在兩個非常討厭的選項中選擇，進退兩難。
Their country is caught between the devil and the deep blue sea - their leaders cause great suffering, but an invasion aimed at overthrowing them would bring many other problems.
他們的國家陷入了兩難的選項中，他們的領導人帶來了巨大的痛苦，但是想要推翻領導人而發動襲擊則會帶來許多其他的問題。
For most people a visit to the dentist is the result of a choice between the devil and the deep blue sea - if you go you suffer, and if you don't go you suffer.
對於大多數人來說去看牙醫是左右爲難後選出的結果，如果你去，那麼受罪，而如果你不去，你還是受罪。
2、blue and white
a police car; the police. (Used in cities where the police cars are painted blue and white.)
警車?；警察。（在警車用藍色和白色噴漆的城市裏使用）
A blue and white suddenly appeared, and I knew we were finished.
一輛警車突然出現後，我知道我們完了。
3、blue boys
the police. (see also men in blue.)
警察。（同見men in blue）
Four blue boys held me while a fifth slipped the cuffs on me.
四位警察按着我的時候第五位給我戴上手銬。
The men in blue are hammering at my door. I’m going out the back way.
警察正敲打我的門。我要從後門走了。
You can depend on the boys in blue to clean things up in this town.
你們可以靠警察來整頓這個鎮子。
4、blue code of silence
An unspoken policy of concealment by police regarding the wrongdoing or illicit activity of other officers. Primarily heard in US, South Africa.
由於警方有關不當行爲或其他官員的違法活動而藏匿事實的一種沉默政策。主要在美國和南非使用。
I respect the need for the police, but it's hard to trust them completely when so many stories of the blue code of silence come to light.
我尊重對警察的需要，但當這麼多警方保持沉默的真相曝光後，很難再去完全信任他們了。
5、a bolt from the blue
Something unexpected or surprising.
一些預料外、令人驚訝的事情。
His sudden death came as a bolt from the blue.
他的突然去世猶如晴天霹靂。
The news that they had got married was a bolt from the blue.
他們已經結婚的消息讓我目瞪口呆。
He seemed to be very happy in his job, so his resignation came as a bolt out of the blue.
他看起來在他的工作中很開心啊，所以他的辭職實在是出乎意料。
6、black and blue
if a person or part of their body is black and blue, their skin is covered with bruises (= black marks caused by being hit)
如果一個人或身體的部分是black and blue，他們的皮膚上就是有些淤青了（=由於被打而產生的黑色印記）
He was beaten black and blue at boarding school.
他在寄宿學校被打得青一塊紫一塊。
I’m still black and blue from my divorce.
我依然因爲離婚而傷痕累累。
7、blue blood
the blood [heredity] of a noble family; aristocratic ancestry.
貴族家庭遺傳的血液；貴族血統。
The earl refuses to allow anyone who is not of blue blood to marry his son.
這位伯爵拒絕任何非貴族血統的人嫁給他兒子。
Although Mary's family is poor, she has blue blood in her veins.
雖然Mary的家庭貧窮，但她仍流淌着貴族的血液。
8、turn the air blue
To speak a stream of bad language; to curse and swear. To use profane language, especially with great rapidity and intensity.
說一連串不好的話；詛咒和發誓。使用褻瀆的語言，特別是說得極速很強烈。
My dad turned the air blue after he found out I'd put a dent in his car.
我爸發現我把他的車撞了一個坑後，破口大罵
9、true blue
Loyal, faithful.
忠誠的，忠實的。
You can count on her support; she's true blue.
你可以依靠她；她值得信賴。
10、have the blues
Also, feel blue . Feel depressed or sad
也用作feel blue。感到沮喪或難過。“無精打采，情緒低落”
I don't know what it is, but I find I always have the blues on Sundays.
我不知道怎麼了，但我在星期天的時候情緒總是很低落。
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