You are given a sentence in English. Your job is to translate the English sentence into Galician.

They appointed an officer who would mediate between the vendor and the purchaser.
Nomearon a un encargado que mediaría entre o vendedor e o comprador.

And she was the best in the class at those subjects.
e foi a mellor da súa clase nesas materias.

So how can a hormone ultimately affect the rate of aging?

Como pode unha hormona afectar á tasa de envellecemento?

