这把剪刀很锋利。

Zhè bǎ jiǎndāo hěn fēnglì.

This pair of scissors is very sharp.

我用剪刀剪纸。

Wǒ yòng jiǎndāo jiǎn zhǐ.

I use scissors to cut paper.

她手里拿着一把剪刀。

Tā shǒulǐ názhe yī bǎ jiǎndāo.

She is holding a pair of scissors in her hand.