To help you get started we provide machine translations at no additional charge. We know machine translation isn't perfect but it's an easy way to start your translation project. Additionally, some translators use it to help expedite the translation process by allowing them to make simple edits to the translations.
Your account is automatically defaulted to order machine translations for active phrases. If you prefer to turn this feature off go to your project settings.
And change "Automatically order translations" to your desired setting.