资料来源 : pyDict

提高嗓门,大声讲;大胆讲,毫无保留地说

资料来源 : WordNet®

speak up
     v 1: speak one's opinion without fear or hesitation; "John spoke
          up at the meeting" [syn: {opine}, {animadvert}, {sound
          off}]
     2: speak louder; raise one's voice; "The audience asked the
        lecturer to please speak up"