20.2用英语怎么说

20.2 in English is "twenty point two." It is a numerical representation that is commonly used in mathematical and scientific contexts to indicate a specific quantity or measurement. The decimal point separates the whole number (20) from the fractional part (2/10 or 0.2). The use of a decimal point and digits to the right of it to indicate a fractional value is a standard convention in decimal numeration systems.
Examples:
The temperature is 20.2 degrees Celsius. (温度是20.2摄氏度。)
The weight of the package is 20.2 pounds. (包裹的重量是20.2磅。)
The distance between the two cities is 20.2 kilometers. (两个城市之间的距离是20.2公里。)