After considering for a time, he came to the conclusion that this was probably because the slant of her shoulders was not quite the same on both sides, causing the clothes to not fit her properly.
他推測﹘﹘可能是母親平日勞動，兩邊肩膀的斜度不一，造成了衣服不合身。但是，市面上的衣服雙肩都是同樣斜度，不可能按顧客的身材調整。