他哼着曲子从山上走下来的英文

he walked down the hill singing softly to himself

• 他:    he
• 哼:    humph; tut; umph
• 着:    wear; dress
• 曲子:    song; tune; melody
• 从:    follow
• 上:    upper; up; upward
• 走:    walk; go