ballpoint

n.

（笔的）圆珠笔；

复数：ballpoints

ballpoint pen n. 原子笔，圆珠笔

1. Do you sell this kind of ballpoint?
   你们卖这种圆珠笔吗？
2. You can buy the ballpoint pen anywhere.
   你到哪儿都能够买到这种圆珠笔。
3. The boys were bickering over some ballpoints.
   那些男孩子为几支圆珠笔争吵起来了。

Ballpoint pen
Ballpoint stylus
Photofading of ballpoint dyes studied on paper by LDI and MALDI MS.
Some new ideas for dating ballpoint inks - A feasibility study
HPLC analysis of ballpoint pen inks stored at different light conditions
Ink for an aqueous ballpoint pen using oil-in-water type resin emulsion and an aqueous ballpoint pen using the ink
Differentiation of Blue Ballpoint Pen Inks by Laser Desorption Ionization Mass Spectrometry and High‐Performance Thin‐Layer Chroma...
Reliability of Semmes Weinstein monofilament and ballpoint sensory testing, and voluntary muscle testing in Bangladesh
Forensic classification of ballpoint pen inks using high performance liquid chromatography and infrared spectroscopy with principal ...
Application of Raman Spectroscopy and Surface-Enhanced Raman Scattering to the Analysis of Synthetic Dyes Found in Ballpoint Pen Ink...