Les enfants sont contents - the children are happy.
sont / suis enfant unique means "are / is an only child" in French.
Ils sont, elles sont means 'they are' in English.
It means "They are" -- feminine. Masculine would be "Ils sont"
Les souris sont petites mean "the mice are small" in English.
'sont' is the third person plural for the verb "être", 'to be'. Ils sont, elles sont mean 'they are' (masculine then feminine version)
les singes sont partout means "monkeys are everywhere" in English.
"They (fem.) are clean"
Are of the sisters or are the sister's.
Where are the princesses? -
"Sont" is a conjugation of être - to be. Ils sont means "they are" and les is the plural definite article. So "sont le" does not mean anything in itself, but may be next to each other in a sentence.
Ils sont in French means "They are" in English.
"Les deux sont très beaux" translates to "Those two are very beautiful"