Carpe diem will someday die. It is medieval Latin, dating to 1287. Related but distinct is the expression "memento mori" (remember that you are mortal) which carries some of the same connotation as . For Horace, mindfulness of our own mortality is key in making us realize the importance of the moment. "Remember that you are mortal, so seize the day." Over time the phrase also came to be associated with penitence, as suggested in many vanitas paintings. Today many listeners will take the two phrases as representing almost opposite approaches, with urging us to savour life and urging us to resist
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