gleam          
 verb [ I ] uk/ɡliːm/ us/ɡliːm/
 发微光;闪烁;闪现
to produce or reflect a small, bright light
  He polished the table until it gleamed. 他把桌子擦得锃光瓦亮。 
  (眼睛)闪烁
When eyes gleam, they shine in a way that expresses a particular emotion.
  His eyes gleamed with/in triumph. 他眼中闪现出胜利的光芒。 
 gleam      
noun [ C usually singular ] uk/ɡliːm/ us/ɡliːm/
 闪烁;闪亮;闪现
an occasion when something gleams
 Idiom   
a gleam in your eyeidiom  (因为开心或心里有秘密而)眼睛发光
an expression in your eyes that shows that you are amused or that you have a secret
  "I can't tell you that yet, but I will soon," Grandpa said with a gleam in his eye.