What does the writer mean in this paragraph? i'm reading a book named "the Word Brain" - a book about how to learn foreign language well. And in chapter Speaking, he wrote: "If you are at home, listen to yourfavourite language CDs and repeat the now familiar words and sentences. Imitate the sounds, in particular the length of the vowels and the melody of the sentences. Later, repeat the sentences in real-time, with an interval of just one second. You will be amazed at how the sounds soon start to come out of your mouth". I don't understand the phrase " with an interval of just one second", because if i "Imitate the sounds" ( repeat every sentence in the paragraph that i'm listening in CD), so the person in the CD say first, and i repeat after, so why can i do repeat the sentences in real-time "with an interval of just one second". Does the writer means "First, i repeat every sentences in the CD, and then I have to memorize all that sentences, and repeat the sentences in real-time, with an interval of just one second"?