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COLOUR
藍色；天藍色
Something that is blue is the colour of the sky on a sunny day.
例句
There were swallows in the cloudless blue sky...
燕子在萬里無云的藍天飛翔。
She fixed her pale blue eyes on her father's.
她淡藍色的眼睛緊緊盯著她父親的雙眼。
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N-PLURAL
藍調音樂，布魯斯音樂（源于美國南部黑人音樂家，節奏緩慢，旋律感強）
The blues is a type of music which was developed by African American musicians in the southern United States. It is characterized by a slow tempo and a strong rhythm.
例句
His singing really does have the depth and the emotional range of the blues.
他的歌聲確實頗有布魯斯音樂的內蘊和情感深度。
...the blues bars of Chicago.
芝加哥的藍調酒吧
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N-PLURAL
憂郁；沮喪；悲傷
If you have got the blues, you feel sad and depressed.
例句
Interfering in-laws are the prime sources of the blues.
喜歡指手畫腳的姻親最讓人頭疼。
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ADJ-GRADED
憂郁的；沮喪的；悲傷的
If you are feeling blue, you are feeling sad or depressed, often when there is no particular reason.
例句
There's no earthly reason for me to feel so blue.
我也說不出來為什么這么沮喪。
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N-COUNT
（劍橋或牛津大學的）校隊運動員，藍色榮譽者
A Cambridge blue or an Oxford blue is a man or woman who has played for Cambridge or Oxford University in a particular sport.
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ADJ
色情的；黃色的
Blue films, stories, or jokes are about sex.
例句
...a secret stash of porn mags and blue movies.
偷偷藏起來的一堆色情雜志和黃色影碟
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PHRASE
突然；出乎意料地
If something happens out of the blue, it happens unexpectedly.
例句
One of them wrote to us out of the blue several years later.
數年后他們中的一人突然給我們寫了一封信。