Presentation开场白语言表达技巧
通常在进行presentation之前，必要的开场白和简要梗概都是有必要的，例如这次的pre大致是什么主题、包含了那些内容、以及可能的时长等等。如果一个pre是由多个同学轮流讲述，也可以对每个人负责的部分进行简单的概括。
首先大家可以从一些简单的”热场子“的寒暄话语开始，必要的时候简单地介绍下自己的背景或pre的目的，然后快速进入主题内容。以下为presentation开场白的例子，供大家参考：
Welcome / Hello everyone.
As you all know, this company is losing its market share, but we are being asked to increase sales by 20%–25%. How can we possibly increase sales in a shrinking market?
Today I am going to talk to you about how we can do this. My presentation will be in three parts.
Firstly I am going to look at the market and the background. Then I am going to talk to you about our new products and how they fit in. Finally, I'm going to examine some selling strategies that will help us increase our sales by 20%.
The presentation will probably take around 20 minutes. There will be time for questions at the end of my talk.
下面是一些实用的开场词英语口语表达：
My presentation is in three parts.
My presentation is divided into three main sections. Firstly, ... Secondly, ... Thirdly, ... Finally…
I will talk about …
We will examine …
I'm gonna tell you something about the background …
I will give you some facts and figures …
We will concentrate on ...
I will limit myself to the question of…
如果你给观众互动或老师提问留了一点时间，可以这么说：
Please feel free to interrupt me if you have questions.
There will be time for questions at the end of the presentation.
I'd be grateful if you could ask your questions after the presentation.
02.Main Body主体部分
在演讲过程中，可能会存在每个部分是独立的状况，也有可能各部分之间存在一定的关联性。小狮子之前的课程就存在几个同学分别准备不同部分，每个人pre自己的部分的情况，但同时要确保整个presentation的各部分之间是存在一定关联性的，这时候就需要采用一些关联性的词汇。
这种情况下，你可以试试看下面这些口语表达方法：
As I said at the beginning …
As you remember, we are concerned with …
This ties in with my original statement …
This relates directly to the question I put to you before …
03.Introduce Visuals解释表图
很多时候为了表明一些观点和知识背景，大家在pre的时候会穿插一些图片或者表格来做辅助说明。这样可以让听众对你所表达的数据信息有清晰的认识和了解，也有助于自己更好地表达这些信息。
那么如何引听众去看图表呢？
This graph shows you …
Take a look at this …
If you look at this, you will see …
I'd like you to look at this …
This chart illustrates the figures …
This graph gives you a breakdown of…
在表达的过程中，你可以稍作停顿以给观众一些时间去消化图表上内容，同时可以引导他们按照你的描述方式和解释模式去理解图表的含义，比如像下面这样：
As you can see …
This clearly shows …
From this, we can understand how/why …
This area of the chart is interesting …
图表通常来说，分为line chart (线状图)和pie chart (饼状图)，示例如下：
1. Line charts show a relationship between two variables over a period time.
2. Pie charts are best for showing percentages and proportions. With pie charts, we show how important each part is, and how it adds up to the total.
那么，一般做演讲用到的图表，一定是要讲各种变化、趋势。下面来看看各种变化怎么地道地表达，以及不同变化情况，如上升、下降、有升有降、平稳等的具体表达：
一般程度的变化：slight, minor, steady
剧烈程度的变化：dramatic, major, massive, disastrous, rapid, unparalleled
从时间维度来看的变化：gradual, sharp
1. 上升的表达
一般程度上升: climb, rise, increase, gain, strengthen
剧烈程度上升: surge, rocket, soar, go through the roof, jump
2. 下降的表达
一般程度下降: decline, decrease, drop, fall, slide, weaken, dip
剧烈程度下降: slump, crash, collapse, plummet, plunge
3. 回升的表达
rally, recover, improve, bounce back
例如：Our revenues took a slight dip in the third quarter but rallied to its previous levels within the first month of the fourth quarter.
4. 稳定的表达
一般程度的稳定: hold steady, level off, stabilize
长期的稳定: stale, immovable, stagnant
例如：Despite some ups and downs, our growth is relatively stable. (Positive)
例如：After a year of ups and downs, their growth is stagnant. (Doubtful)
