Hello, everyone! I’m David Landis. As you know, global warming is a serious threat to our plant. How can we individually help to solve this problem? So, today I am going to talk about how we can make it happen.My presentation will be in three parts. First,I am going to give you some facts and figures. Then, I am going to talk about our latest research and how it work. Finally,I'm going to tell the importance of your help that will slow down the temperature. The presentation will probably take 30 minutes. There will be time for questions at the end of my talk.首先，我們在開場白的時候，在簡單自我介紹，接著帶出主題後，可以先簡單地向大家說明自己演講程序，分為幾個部分、演說的時間、該怎麼發問等等，讓大家對於內容有個初步的概念。實用開場白例句◎ My presentation is in three parts. ◎ Firstly, secondly, thirdly, finally…/ First, then, finally…◎ I'm going to…◎ tell/give you something about…◎ I'd be grateful if you could ask your questions after the presentation.◎ Please feel free to interrupt me if you have questions.接著，在我們演講的過程中，我們可以提醒觀眾之前說過的重點，接著引導大家至下一個論點。◎ As I said at the beginning…◎ As you remember, we are concerned with…◎ I'd like to move on to/ turn to…◎ Now I'd like to look at…◎ This leads me to my next point…想要解釋圖片或是圖表時，我們可以這麼說...◎ This graph shows you…◎ Take a look at this…◎ If you look at this, you will see…◎ This chart illustrates the figures…◎ As you can see, this graph tells us…◎ This clearly shows …◎ From this chart, we can understand …到了總結的時候，我們可以帶回開頭主旨，再次闡明重點，接著就可以開放問題回答。◎ To summarise, …◎ In brief, I've talked about…◎ So I hope that you're a little clearer on how we can achieve our goal...◎ So I want to go back to the beginning when I asked you…◎ I hope that my presentation today will help you with what I said at the beginning…◎ Thank you for listening and now if there are any questions, I’d like to answer them.◎ Thank you for your attention. I'd be glad to answer any questions you might have.面對問題，一時反應不過來時，我們可以把問題覆述一次，爭取更多時間作出更好的回應。◎ Thank you for asking. What is our plan for next year?◎ Thank you. So you would like further clarification on our research?◎ That's an interesting question. How are we going to increase our profit?在回答問題之後，對於提問者詢問是否滿意答案或是能否明白我們所說的◎ Does this answer your question?◎ What I mean to say is…I hope this explains the situation for you.◎ Let me just say that in another way…I hope this was what you wanted to know.如果很不幸地回答不了問題的時候，這時，我們就勇於承認吧！◎ That's an interesting question. I'll try to get back to you later with an answer.◎ I'm afraid I'm unable to answer that now. Maybe I can get back to you later.◎ Good question. I can't give you an accurate answer if we don't have further study on it.