ballpoint 基本解释
n. 圆珠笔
ballpoint 词性变化
名词复数形式:ballpoints
词组短语
1、ballpoint pen n. 圆珠笔
2、ballpoint (pen) 圆珠笔（钢笔）
3、ballpoint pen stain 圆珠笔污渍
4、ballpoint pens n.原子笔，圆珠笔
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