Translation of "Ballpoint" in Chinese

My beautiful ballpoint pen is purple.

我漂亮的圓珠筆是紫色的。

Do you have a ballpoint pen?

你有圓珠筆嗎？

My ballpoint pen just ran out of ink.

我的原珠筆沒墨了。

Would you please write with a ballpoint pen?

你能用圆珠笔写吗？

The baby caught sight of my ballpoint pen and reached out for it.

這個嬰兒盯著我的原子筆看, 並且伸手要拿它。