beam with joy; feel happy at success; unknit one’s eyebrows ❍ 须臾之间，只见戴宗～，便爬起来。(《水浒全传》489)In a short time Dai Zong was seen to lift his eyebrows and open his eyes and he scrambled up. ❍ 试验成功后. 科研人员个个～，手舞足蹈。When the experiment was proclaimed a success,all the research workers unknitted their eyebrows and danced for joy.