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N-COUNT
球
A ball is a round object that is used in games such as tennis, baseball, football, basketball, and cricket.
例句
...a golf ball.
高爾夫球
...a tennis ball.
網球
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N-COUNT
球狀物
A ball is something or an amount of something that has a round shape.
例句
Thomas screwed the letter up into a ball...
托馬斯把信揉成一團。
They heard a loud explosion and saw a ball of fire go up.
他們聽見一聲爆炸的巨響，看見一個火球騰空而起。
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V-ERG
（使）成球狀（或團塊）
When you ball something or when it balls, it becomes round.
例句
He picked up the sheets of paper, and balled them tightly in his fists...
他抓起那幾張紙，在手里緊緊攥成團。
His hands balled into fists...
他攥起了拳頭。
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N-COUNT
（腳趾和腳相連或拇指和手相連的）球狀部位；腳趾球；拇指球
The ball of your foot or the ball of your thumb is the rounded part where your toes join your foot or where your thumb joins your hand.
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N-COUNT
舞會
A ball is a large formal social event at which people dance.
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N-COUNT
睪丸
A man's balls are his testicles.
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PHRASE
輪到…采取行動（或作出決斷）
If you say that the ball is in someone's court, you mean that it is his or her responsibility to take the next action or decision in a situation.
例句
The ball's now in your court — you have to decide what you're going to do.
輪到你了——你必須決定自己要做什么。
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PHRASE
使某事發生；開始某種活動
If you get the ball rolling ,set the ball rolling, or start the ball rolling, you start something happening.
例句
He will go to the Middle East next week to get the ball rolling again on peace talks...
他下周將前往中東，開始重啟和談。
I just want enough cash to start the ball rolling.
我只是想有足夠的啟動資金。
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PHRASE
玩得很開心；盡情歡樂
If you are having a ball, you are having a very enjoyable time.
例句
Outside the boys were sitting on the ground and, going by the gales of laughter, they were having a ball.
男孩們在戶外席地而坐，從陣陣笑聲來看，他們玩得很開心。
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PHRASE
同時做數件事情
If you keep several balls in the air, you try to do several different things at once.
例句
The detective has to discover the motive, the means and the opportunity and has to keep these three balls in the air.
那名偵探必須查明動機、手段和時機，而且對這三項的調查必須同步展開。
...unhappy mothers trying to juggle ten balls in the air.
同時要做無數件事情的可憐的母親
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PHRASE
警覺；機警；留心
If someone is on the ball, they are very alert and aware of what is happening.
例句
She really is on the ball; she's bought houses at auctions so she knows what she's doing.
她很精明干練；她通過拍賣購過房，所以知道自己在做什么。
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PHRASE
愿意合作
If someone refuses to play ball, they are unwilling to do what someone wants them to do.
例句
The association has threatened to withdraw its support if the banks and building societies refuse to play ball.
該協會威脅說如果銀行和建屋互助會不配合的話，它將不再提供支持。