'온도차' literally means 'temperature changes' but sometimes it is used in a metaphorical way.
When people have different ideas or feelings about a certain topic, you can also use '온도차'. It is more like a "gap".
2017년 11월 2일
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온도차(溫度差) means "temperature difference"
"temperature changes" means 온도변화
밤과 낮의 온도차가 크다 = There is a large temperature difference between day and night.