Odes (Horace) the inventor of the lyre; skilled in craft and cunning; and the conductor of souls to the Underworld. I.11, "Tu ne quaesieris..." – Carpe Diem! – The poet seeks to dissuade Leuconoe from giving heed to the false arts of astrologers and diviners. It is vain to inquire into the future – Let us enjoy the present, for this is all we can command. It closes with the famous line: "carpe diem, quam minimum credula postero" (Seize the day, trusting tomorrow as little as possible). I.12, "Quem virum aut heroa lyra..." – The Praises of Augustus – The poet praises
Evaluation of machine translation quality is reasonably intuitive. A round-trip translation is not testing one system, but two systems: the language pair of the engine for translating "into" the target language, and the language pair translating "back from" the target language. Consider the following examples of round-trip translation performed from English to Italian and Portuguese from Somers (2005): In the first example, where the text is translated into Italian then back into English—the English text is significantly garbled, but the Italian is a serviceable translation. In the second example, the text translated back into English is perfect, but the Portuguese translation is meaningless. While