自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-COUNT 球 A ball is a round object that is used in games such as tennis, baseball, football, basketball, and cricket.
...a golf ball.
...a tennis ball.
N-COUNT 球状物 A ball is something or an amount of something that has a round shape.
Thomas screwed the letter up into a ball...
They heard a loud explosion and saw a ball of fire go up.
V-ERG （使）成球状（或团块） When you ball something or when it balls, it becomes round.
He picked up the sheets of paper, and balled them tightly in his fists...
His hands balled into fists...
N-COUNT （脚趾和脚相连或拇指和手相连的）球状部位；脚趾球；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.
N-COUNT 舞会 A ball is a large formal social event at which people dance.
N-COUNT 睾丸 A man's balls are his testicles.
PHRASE 轮到…采取行动（或作出决断） 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.
The ball's now in your court — you have to decide what you're going to do.
PHRASE 使某事发生；开始某种活动 If you get the ball rolling ,set the ball rolling, or start the ball rolling, you start something happening.
He will go to the Middle East next week to get the ball rolling again on peace talks...
I just want enough cash to start the ball rolling.
PHRASE 玩得很开心；尽情欢乐 If you are having a ball, you are having a very enjoyable time.
Outside the boys were sitting on the ground and, going by the gales of laughter, they were having a ball.
PHRASE 同时做数件事情 If you keep several balls in the air, you try to do several different things at once.
The detective has to discover the motive, the means and the opportunity and has to keep these three balls in the air.
...unhappy mothers trying to juggle ten balls in the air.
PHRASE 警觉；机警；留心 If someone is on the ball, they are very alert and aware of what is happening.
She really is on the ball; she's bought houses at auctions so she knows what she's doing.
PHRASE 愿意合作 If someone refuses to play ball, they are unwilling to do what someone wants them to do.
The association has threatened to withdraw its support if the banks and building societies refuse to play ball.