棒球复数用英语怎么说怎么写

棒球复数用英语表示为 "baseballs"。

其来源是在英语语法中，名词可以分为可数名词和不可数名词。可数名词可以用复数形式表示多个，如 "apples" 表示多个苹果。而 "baseball" 为可数名词，所以复数形式为 "baseballs"。

例句:

"I bought three baseballs for my little brother to play with." (我给我弟弟买了三个棒球玩。)
"The baseball team needs more baseballs for their next game." (棒球队需要更多的棒球来参加下一场比赛。)