And then, when I was actually observing him walking to his dining table, it struck me, this man who finds it so difficult to walk on flat land, how does he climb a staircase?
彼が食卓に歩いて 向かっている様子を 見た時 衝撃を受けました 彼にとって平らな地面を歩くのが とても難しいのです では 階段の昇降は？