问题描述：
single a double a triple a 在美国棒球里面是什么意思呢?
Do baseball players in single a and double a and triple a get paid a salary? 这句话里面single a and double a and triple a 是什么意思呢?
Do baseball players in single a and double a and triple a get paid a salary? 这句话里面single a and double a and triple a 是什么意思呢?
问题解答：
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