You say, "I love you," and the computer is likely to understand, and can accurately transmit your sentiment. But if you say "I'll love you until the end of time, until the seas dry up and the mountains crumble.
你說：「我愛你」，電腦可能還聽得懂，可以正確地顯示你的心聲；然而你若說：「我愛你到天荒地老，海枯石爛，此生不渝… …」，人腦可能很受用，電腦可就「不知所云」了。