Meaning: A girl expressed happiness by showing her teeth.
Choice of Words: Girl is a young female child. Smiled is the past tense of smile. At means facing or directed toward. Boy is a young male child.
Alternative Expressions
The young lady smiled towards the young gentleman.
Meaning: This sentence conveys the same meaning as the original sentence, but it uses more formal language.
Choice of Words:The young lady is a more formal way to refer to a girl. Towards is a preposition that indicates the direction or location of something. The young gentleman is a more formal way to refer to a boy.
The female child expressed joy in the presence of the male child.
Meaning: This sentence uses more technical language to convey the same meaning as the original sentence.
Choice of Words:The female child is a technical way to refer to a girl. Expressed joy is a more specific way to describe smiling. In the presence of means that the girl is smiling while the boy is present.