at the drop of a hat英语标准发音:at the drop of a hat英式发音:美式发音:翻译中文一触即发at the drop of a hat - 基本释义[词典1]毫不犹豫地;非常乐意地 参考资料: 1.百度翻译:at the drop of a hat2.有道词典:at the drop of a hat3.爱词霸:at the drop of a hat