七十三度是温柔三十七度是体温
[qī shí sān dù shì wēn róu sān shí qī dù shì tĭ wēn]
73 degrees represents tenderness, and 37 degrees is body temperature, which symbolizes the warmth of human emotion and care versus the natural body heat of a person. It implies different degrees of warmth between human emotions and physical conditions.