There is an overflow of cheap ballpoint pens in the market.

市场上圆珠笔泛滥。

I changed the ink cartridges in my ballpoint pen.

我换了圆珠笔里的墨水芯。

A ballpoint pen is adequate for most ordinary purposes.

原珠笔适合最普的用途。

Emblema is available as fountain pen with 18K gold nib and ebonite feeder, rollerball pen and twist-action ballpoint pen.

徽章系列有18K金笔尖墨水笔、走珠笔和旋式原子笔可供选择。