It seemed to me that you were stressed. If I were you, I would cool down a little.

cool 在这里是动词，意思是"使冷静、使平静"。 down 是副词，表示"向下、减弱"的状态。 cool down 是一个动词短语，意思是"冷静下来、平复情绪"，常用于描述从激动或紧张状态恢复到平静状态的过程。