For example, the normal body temperature of the human body is 37 degrees Celsius, which is written as 37 degrees Celsius and read as 37 degrees Celsius, and cannot be read as "37 degrees Celsius" (emphasis). For temperatures below 0℃, add a minus sign before the degree, such as -4℃, which means minus 4℃, or read minus 4℃. I can't understand "4 degrees below zero".
Temperature (temperature)
It is a physical quantity indicating the degree of heat and cold of an object. Microscopically, it is a physical quantity used to measure the thermal motion intensity of an object molecule. Temperature can only be measured indirectly through some characteristics of objects changing with temperature. The scale used to measure the temperature of an object is called a temperature scale. It specifies the reading starting point (zero point) of temperature and the basic unit for measuring temperature. The internationally used temperature scales are Fahrenheit scale (F), centigrade scale scale (C), thermodynamic scale (K), Liechtenstein scale (R), Rankine scale (R) and international practical scale.