natural - unthinking; prompted by (or as though by) instinct; "a cat's natural aversion to water"; "supplying to help you was as instinctive as respiratory"小的数字（限于 Ⅰ、X 和 C）在大的数字的左边，所表示的数等于大数减小数得到的数。We now have a specialist staff that specialises in IV therapy and helps you ta