a pen that has a small metal ball as the point of transfer of ink to paper 同义词：ballpoint, ballpoint pen, Biro,
例句与用法
1.
What he wants to buy are three books and two ballpens 他想买的是三本书和两支圆珠笔。
2.
I don ' t have any pen or ballpen with me 我没有带钢笔或圆珠笔。
3.
Ballpen anti - slippery rubber 原子笔笔杆软胶
4.
These entries and notations shall be made within twenty - four ( 24 ) hours after the catch was made and shall be written legibly in ink or ballpen 条目和注释应当在捕鱼后二十四（ 24 ）小时以内进行录入，并且应当以钢笔或圆珠笔清晰地书写。
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