The model figure "nine" was such a unique cultural and numeral phenomenon that it almost had influences on every aspect of life.
模式数字“九”是中国古代历史上一种特有的文化现象与数字现象，几乎无所不在。
2
In the aspect of man-machine communication, we use the improved reused keyboard of I/O port to implement the users' data input, and displaying the temperature by two numeral displayers.