light up
 開燈,照亮,點燃;喜形於色,露出愉快的表情
 light up
      v 1: start to burn with a bright flame; "The coal in the BBQ
           grill finally lit up"
      2: make lighter or brighter; "This lamp lightens the room a
         bit" [syn: light, illume, illumine, illuminate]
      3: become clear; "The sky cleared after the storm" [syn: clear
         up, clear, brighten] [ant: overcast]
      4: ignite; "The sky lit up quickly above the raging volcano"
      5: begin to smoke; "After the meal, some of the diners lit up"
         [syn: fire up, light]