我们在那些树皮光滑、呈银灰色的高大山毛榉树下野餐。

We had a picnic under the tall ___beeches with their smooth silver-gray bark.

这个地板的材质是优质的山毛榉，既耐用又美观。

The flooring is made of high-quality ___beech, both durable and beautiful.