Break the tension with smiles and humor to reinforce the idea that this is friendly discourse and that all are working toward a common goal.
2015年12月四级真题（第二套）阅读 Section C
英语六级真题
An analysis of car sales in Germany found that cars with gills that were upturned like smiles sold best.
2019年12月六级真题（第三套）阅读 Section A
柯林斯高阶英汉双解学习词典释义
VERB
微笑;笑
When you smile, the corners of your mouth curve up and you sometimes show your teeth. People smile when they are pleased or amused, or when they are being friendly.