blow hot and cold
对某事物或某人表现出反复无常的情感或态度。
口语·形容某人犹豫不决或态度摇摆
英文释义
to frequently change one's opinion, attitude, or behavior, often making it difficult for others to understand or predict
例句
She keeps blowing hot and cold about the trip—one day she's excited, the next she's not.
典故来源
源自古希腊寓言《伊索寓言》中，一个人对着手指吹气取暖，又对着食物吹气降温，比喻态度反复无常。