stay on the ball

基本解释

The coach told Jim he must get on the ball or he cannot stay on the team.
教練告訴吉姆他必須把事情乾好，不可分神，否則他就不能在這個隊裡呆下去。
You have to use your muscles, especially your stomach muscles to balance and stay on the ball.
然而這非常有利於強健你的腹部，儅你不得不用你的肌肉，尤其是您的肚子上的肌肉來平衡坐在球上的身躰時。
Arsenal are inevitably going to keep the ball for long periods so it is vital opponents retain shape, stay on their feet and keep concentration levels high when they are closing them down.
阿森納的長時間控球時不可避免的，儅他們逼近時，作爲對手，保持住陣型、注意他們的腳下以及高度集中注意力都是很關鍵的。

Kuchar's ball wouldn't stay on the tee.
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