英语翻译when you wave to a friend ,you are using language .when you smile at someone ,you mean to be friendly .when you put one finger in front of your mouth ,you mean''be quiet '' .

问题描述:

英语翻译
when you wave to a friend ,you are using language .when you smile at someone ,you mean to be friendly .when you put one finger in front of your mouth ,you mean''be quiet '' .