I want to buy both a pencil and a ball-point pen.

我也要买铅笔，也要买原子笔。

Tom's father bought him a ball-point pen as a birthday gift.

汤姆的父亲给他买了支圆珠笔做生日礼物。

Use a ball - point pen or similar to push the Reset button on the unit.

使用圆珠笔或类似物体按本机的重设按钮.

As long as he doesn't study hard, ShenJiaYi will use a ball-point pen poked his clothes.

只要他不认真学习，沈佳宜就会用圆珠笔戳他的衣服。