A ball ball-point pen一球圆珠笔
ball-point penetrator球体贯入度仪
ball-point pen圆珠笔;按式圆珠笔
Two ball-point pen两只圆珠笔
BALL-POINT PEN RETRACTABLE原子笔
Pen ball-point material圆珠笔头材料
Ball-point pen design圆珠笔设计
A ball-point pen圆珠笔笔;一球圆珠笔;一支圆珠笔;圆珠笔
Only ball-point pen这只圆珠笔
N-COUNT（可数名词） A ballpoint or a ballpoint pen is a pen with a very small metal ball at the end which transfers the ink from the pen onto a surface. 圆珠笔