The frown signifies an imminent rebuke for which one must prepare, or an uncertainty and hesitation which one must, if possible, remove by saying or doing something to restore confidence.

• 蹙额表明这个人必须准备即将来临的指责,或者指明这个人迟疑不决的态度,必须通过相当的说明或动作来恢复信心。