調節レバーを上に上げると座面の高さを調節できます。

tbd

You can adjust the seat height by moving the adjustment lever up.

まず目に飛び込んできたのは、大きなソファだ。渋い色の革張りで、座面も背もたれもゆったりしている。

tbd

The first thing that came to my attention was the large sofa. It was covered in sober-coloured leather, and the seat and the back both looked wide and comfortable.