导言是文章的首段，应达到一下几个目的。
The introduction is the first paragraph in your essay, and it should accomplish a few specific goals.
从首段出发之日起至最后停留点不少于3天。
Travel from Last stopover must commence no earlier than 3 days after departure from fare origin.
从首段出发之日起至最后停留点不长于60天。
Travel from last stopover must commence no later than 60 days after departure from fare origin.
你一定能在30分钟内改善你的标题、首段、格式和语法。
You can definitely improve your title, first paragraph, formatting, and grammar within 30 minutes.
到2015年，该数字坠入谷底至500。--首段描述数据。
从2010到2015，该数字起伏不定。--首段描述数据。
The figure experienced a fluctuation over the period from 2010 to 2015.
因为短文的首句和首段往往是作者要说明的对象或事件的起因；
Often the waitress tells you her name, but you don't need to tell her yours.
这段也是同意艺术对社会的作用吗？那么是否你首段的观点就该修改了？
Similarly, as for architectural works, they also serve to reveal the social value rather than convey personal ideas.
最后，给学生介绍有利于其身心健康的好习惯。第三段总结呼应首段内容。
Finally, these courses also introduce good habits which are conducive to mental and psychological health.
那些没有被打的孩子在智力和成就的首段测试中的得分明显高于那些被打的孩子。
Those kids who hadn't been spanked in the initial survey period scored significantly better on intelligence and achievement tests than those who had been hit.
进程地址空间的首段地址便是栈，它储存了局部变量以及大多数编程语言的函数参数。
The topmost segment in the process address space is the stack, which stores local variables and function parameters in most programming languages.
例如，可能会有一个网站或者服务说它“确定”某个事务发生了，但实际上在首段没有状态改变。
For instance you might have a website or service that says it "confirms" that a transaction happened, but there was no actual state change at the head end.
它会显示来自发布方网页的截图，文章的主要部分都会显示出来，而不是仅仅提供标题和开头首段。
It will display screen shots from the publishers' websites, showing the bulk of an article rather than just headlines and opening paragraphs.
从柱状图中，我们可以清楚地看出：人们接受教育的方式发生了一种翻天覆地的变化。--首段描述数据。
What is presently vividly in the bar chart is that the way people received education experienced an earth-shaking change.
广州地铁公司计划将把柔性接触网陆续改为刚性接触网。 首段更换工作在杨箕站至体育西站总长一千四百多米的区间进行。
The subway Company of Guangzhou plans to change the flexible contact network into successively a contact network of rigidity.
文章或篇章首段不允许缩进，在一个新篇章(Section)开始时，是不允许首行缩进的，因为这段文字将会是这一页或这一篇章的第一段。
Indenting the opening paragraph of a new section would be redundant, because that paragraph would be the first in that page or section anyway.
文章或篇章首段不允许缩进，在一个新篇章(Section)开始时，是不允许首行缩进的，因为这段文字将会是这一页或这一篇章的第一段。
Indenting the opening paragraph of a new section would be redundant, because that paragraph would be the first in that page or section anyway.
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