1. 眉;眉毛
    Your eyebrows are the lines of hair which grow above your eyes.

2. 竖起眉毛（表示吃惊或反对）
    If something causes you to raise an eyebrow or to raise your eyebrows, it causes you to feel surprised or disapproving.

    e.g. An intriguing item on the news pages caused me to raise an eyebrow over my morning coffee...
           早晨喝咖啡时，新闻版面的一则趣闻令我感到惊奇。
    e.g. He raised his eyebrows over some of the suggestions...
           他对其中的一些建议表示反对。