He snapped the cap on his ballpoint.他吧嗒一声把笔帽扣在了圆珠笔上。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....
He snapped the cap on his ballpoint.他吧嗒一声把笔帽扣在了圆珠笔上。I changed the ink cartridges in my ballpoint pen.我换了圆珠笔里的墨水芯.You can buy the ballpoint pen anywhere.你到哪儿都能够买到这种圆珠笔.The diary comes complete with a gold-coloured ballpoi...