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

市场上泛滥。

I changed the ink cartridges in my ballpoint pen.

我换了里的墨芯。

A ballpoint pen is adequate for most ordinary purposes.

原适合最普的用途。

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金尖墨、和旋式原子可供选择。