求翻译：布艺沙发如何保养？让沙发的靠墙部位同墙壁保持0.51厘米的间隙。避免阳光直射，最好摆放在能避开阳光照射的地方，或用半透明的薄纱窗帘隔开日光。每周至少吸尘一次，尤其注意去除织物结构间的积尘。是什么意思？

How sofa maintenance? Keep your sofa parts against the wall with a wall of 0.51 cm gap. Avoid direct sunlight, where the best placed to avoid sun exposure, or separated by translucent gauze curtain of sunlight. Vacuum at least once a week, paying particular attention to removing dust between fabric structure.