面露喜色:beam

　　笑出声:laugh

　　欢笑:laugh heartily

　　苦笑:wry smile

　　媚笑:ingratiating smile

　　偷笑:titter

　　坏笑:laugh viciously

　　冷笑:sneer

　　嘲笑:deride/mock/ridicule

　　咧嘴笑:grin

　　狂笑:guffaw

　　傻笑:smirk

　　轻声笑:chuckle

　　咯咯笑:giggle

　　爆笑:burst into laughter