求翻译：但须留意避免选用带有镜面的衣柜。有的衣柜外面会配有一块穿衣镜，而且镜子的面积较大。传统文化以为，衣柜的镜子不能对着床头，否则会对睡眠有不利影响。是什么意思？

But with attention to avoid using wardrobe with a mirror. Wardrobe will be equipped with a full-length mirror on the outside, and the larger mirrors. Traditional cultural thought, wardrobe mirror not at bedside, otherwise it will have negative effects on sleep.