look for the friendlier faces and smile at them one by one, then move on to the more skeptical members and smile at them one by one also;
找到那些看起來比較友善的聽眾，逐次朝他們微笑；然後目標轉向那些有些懷疑的聽眾，也逐漸朝他們微笑；
imagine the audience in bathrobes in case you are nervous.
如果你感到緊張，不妨想像聽眾都穿著浴衣的樣子。
how to use the microphone
如何使用話筒
you must speak up and project your voice even if you are using a microphone;
即使是用話筒，也要聲音響亮並運氣發聲；
your voice should be resonant and sustained when you speak;
聲音要有回聲並能稍持續一陣兒；
pitch your voice slightly lower than normal. listeners tend to associate credibility and authority with a relatively deep voice;
音調要定得比正常講話時低一些，聽眾往往把可信度與權威性與一個相對低沉的聲音聯繫在一起；
try to end declarative sentences on a low tone without, however, trailing off in volume;
儘量用降調結束陳述句，但不要減弱音量；
slow down.
放慢語速。
keynote speech
基調發言
a keynote speech is to outline the subjects to be addressed by other speakers at an event,and to establish the tone of a meeting or program.
基調發言也稱主題演講，目的就是限定一個集會上其他演講者演講的主題，奠定一個會議或活動的基調。基調發言也直接關係到確立大會的感情基調。
what to say
演講指南