“圆珠笔”造句

莫妮卡拿起她的伯罗圆珠笔，放在牙齿间转动着。
Monica picked up her Biro and revolved it between her teeth.

他吧嗒一声把笔帽扣在了圆珠笔上。
He snapped the cap on his ballpoint.

市场上圆珠笔泛滥.
There is an overflow of cheap ballpoint pens in the market.