Smiling is much more then just a facial expression.

微笑绝不仅仅只是普通的面部表情。

youdao

But making a particular facial expression is just the first step of a smile.

但做出某种特别的面部表情，只是微笑的第一步。

youdao

But making a particular facial expression is just the first step of a smile.

但做出某种特别的面部表情，只是微笑的第一步。

youdao