black hat 表面意思是“黑帽”,暗指“黑客”.例句:1、He used a black hat to pass secret messages.他用一顶黑帽子来传递隐秘的信息。2、The rabbit in the black hat looks very happy.那只戴着黑色帽子的兔子看起来非常高兴。3、Having a black hat on, Chaplin carried a stick, which he used to swing in the air.卓别林头戴一顶黑礼帽,手持一根拐杖,却时常在空中挥舞着。