2 sentences

1. 这张桌子是用橡木做的。

   zhè zhāng zhuō​zi shì yòng xiàng​mù zuò de.

   This table is made of oak.

   Source: Dong Chinese Dictionary

2. 这套家具是用高档橡木制成的，质地非常坚硬。

   zhè tào jiā​jù shì yòng gāo​dàng xiàng​mù zhì​chéng de, zhì​dì fēi​cháng jiān​yìng.

   This set of furniture is made of high-grade oak and has a very hard texture.

   Source: Dong Chinese Dictionary