2 sentences

1. 这个箱子是用厚纸板做的。

   zhè gè xiāng​zi shì yòng hòu zhǐ​bǎn zuò de.

   This box is made of thick cardboard.

   Source: Dong Chinese Dictionary

2. 这把剪刀的刀刃非常锐利，可以轻松剪开厚厚的纸板。

   zhè bǎ jiǎn​dāo de dāo​rèn fēi​cháng ruì lì, kě​yǐ qīng​sōng jiǎn​kāi hòu​hòu de zhǐ​bǎn.

   The blades of these scissors are extremely sharp and can easily cut through thick cardboard.

   Source: Dong Chinese Dictionary