高温 gāowēn high temperature
How to remember 高温: 高 high + 温 warm = high temperature.
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How it is used
- A noun for "high temperature", common in weather and science registers: 高温预警 (gāowēn yùjǐng) - heat warning; 高温天气 (gāowēn tiānqì) - hot weather.
- Also used for cooking/industrial heat: 高温消毒 (gāowēn xiāodú) - sterilize with high heat.
- Functions as a noun or attributive, not as a full sentence like "it's very hot" - for that, use 天气很热 (tiānqì hěn rè).