(1)The length of a speech is a matter of great importance.An hour is long enough for a good publish speech.(2)A successful public speaker’s main object is rouse and keep the attention of his audience.(3)Good anecdotes and stories are great aids to public speaking.(4)When you address public audience you must prepare your speeches in advance.(5)The whole speech must be a logical one closely argued and with the deliberate purpose of making the points you want to stress.(6)The language of your speech is important.(7)The essential background of all public speaking is the audience.这几句怎么翻译啊?