surface-cooler

基本解释

Consequently, the metal surface remains 8-15℃ cooler.
因此，金属表面温度仍然较外部低8-15度。
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Upper-level air is pulled down toward the surface while surface-level air is pushed up, causing warmer and cooler air to mix.
上层空气被压向地面而近地面的空气被挤升，引起冷热空气混合。
It's four to five times dimmer and 130 degrees cooler than previous record-holders, with a surface temperature of about 100 degrees Celsius — comparable to a cup of hot tea.
它比之前最冷最暗的棕矮星还要暗4~5倍，低130度。其表面温度约100摄氏度，与一杯刚刚冲泡的热茶温度相当。