我在玩手機用英文怎麼表達？

A group of kids were playing with a ball in the street.

一羣孩子在街上玩球。

The children were playing in the sand.

孩子們正在玩沙子。

Germany is playing a leading role on the international stage.

德國在國際政治舞臺上起着主導作用。

The mobile phone business was actually his bread and butter.

移動電話業務實際上是他的主業。

In the budget before last a tax penalty on the mobile phone was introduced.

上上次的預算案中對移動電話引入了懲罰性稅收。