a-ball

Methods: One was A-ball whose abutment cooperated in the ball attachment, the other one was B-ball whose abutment separated from the ball attachment.

方法：设计了两种球帽固位体：一种基台与球体为一整体（A-球），另一种基台与球体分离（B-球）。

Roll it up in a ball.

把它卷成一个球。

When a fast ball lands short of you, you have to play back.

当一个快球靠近你着地时, 你得后退一步击球.

They saw a big flash and a huge ball of fire reaching hundreds of feet into the sky.

他们看见一道强光和一个巨大的火球冲向数百英尺的高空。

Screw the foil into a little ball.

把箔纸揉成小团。

She crumpled the letter up into a ball and threw it on the fire.

她把那封信揉成一团扔进了火里。

The boys were knocking a ball around in the back yard.

男孩们在后院踢球玩儿。

He spent hours throwing a tennis ball against a wall.

他好几个小时都对着一堵墙掷网球。

Jan has passed the ball to the insideright, a wonderful pass.

简把球传给了右内锋, 传得可真漂亮.

He gave the ball a terrific belt.

他给那球狠狠一击.

Shape the dough into a ball.

把和好的面揉成一团。