...a golf ball.

高尔夫球

...a tennis ball.

网球

Thomas screwed the letter up into a ball.

托马斯把信揉成一团。

They heard a loud explosion and saw a ball of fire go up. [+ of]

他们听见一声爆炸的巨响，看见一个火球腾空而起。

He picked up the sheets of paper, and balled them tightly in his fists. [VERB noun adv./prep.]

他抓起那几张纸，在手里紧紧攥成团。

His hands balled into fists. [VERB adv./prep.]

他攥起了拳头。

I picked up the balled socks. [VERB-ed]

我把卷成团的袜子拾掇起来。

The ball's now in your court — you have to decide what you're going to do.

轮到你了—你必须决定自己要做什么。

He will go to the Middle East next week to get the ball rolling again on peace talks.

他下周将前往中东，开始重启和谈。

I just want enough cash to start the ball rolling.

我只是想有足够的启动资金。

Outside the boys were sitting on the ground and, going by the gales of laughter, they were having a ball.

男孩们在户外席地而坐，从阵阵笑声来看，他们玩得很开心。

The detective has to discover the motive, the means and the opportunity and has to keep these three balls in the air.

那名侦探必须查明动机、手段和时机，而且对这三项的调查必须同步展开。

...unhappy mothers trying to juggle ten balls in the air.

同时要做无数件事情的可怜的母亲

She really is on the ball; she's bought houses at auctions so she knows what she's doing.

她很精明干练；她通过拍卖购过房，所以知道自己在做什么。

The association has threatened to withdraw its support if the banks and building societies refuse to play ball.

该协会威胁说如果银行和建屋互助会不配合的话，它将不再提供支持。