我刚买了一台新的电脑。

Wǒ gāng mǎi le yì tái xīn de diànnǎo.

I just bought a new computer.

我看得出来他在台上唱歌的时候很紧张。

Wǒ kàndechūlái tā zài táishàng chànggē de shíhou hěn jǐnzhāng.

I can see he is very nervous when singing on stage.

你可以去问一下前台的职员。

Nǐ kěyǐ qù wèn yíxià qiántái de zhíyuán.

You can ask the staff at the front desk.