在许多国家，向未成年人出售酒精饮料在法律上是不允许的。

In many countries, it is not ___legally permissible to sell alcohol to minors.

一旦你年满18岁，你在法律上就被视为成年人。

Once you turn 18, you are ___legally considered an adult.

该公司根据新规定合法运营。

The company operates ___legally under the new regulations.