a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another;
"he added more coolant to the car's radiator"
"the atomic reactor used a gas coolant"
"lathe operators use an emulsion of oil and water as a coolant for the cutting tool"
coolant的用法和樣例：
例句
用作名詞 (n.)
The enquiry found that the light aircraft crashed after its engine seized up through lack of coolant. 調查報告表明，這架輕型飛機是由於發動機缺少冷卻劑而失靈墜毀的。
The atomic reactor used a gas coolant. 這個原子反應堆使用了一種氣態冷凍劑。
For decades industrial plants have lined the shores, using water as a coolant. 工廠在幾十年裡就在湖邊排列成行，利用湖水作為冷卻水。
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