不可能使用相同的HTML结构，你必须有一些东西来区分Hello和How are you。

我建议使用span，然后显示为块(实际上就像<div>)。

P跨度{ 显示:块; ｝ <p><span>hello</span><span>How are you</span></p>

设置一个br标记来显示:none是有帮助的，但是你可以用WordsRunTogether结束。我发现用空格字符代替它更有帮助，就像这样:

HTML:

<h1>
    Breaking<br />News:<br />BR<br />Considered<br />Harmful!
</h1>

CSS:

@media (min-device-width: 1281px){
    h1 br {content: ' ';}
    h1 br:after {content: ' ';}
}

<pre>标签呢?

来源:http://www.w3schools.com/tags/tag_pre.asp

使用,而不是空格将防止中断。

<span>I&nbsp;DONT&nbsp;WANT&nbsp;TO&nbsp;BREAK&nbsp;THIS&nbsp;LINE&nbsp;UP, but this text can be on any line.</span>

CSS中的“\a”命令生成一个回车。这是CSS，不是HTML，所以它应该更接近你想要的:没有额外的标记。

在一个blockquote中，下面的例子同时显示标题和源链接，并用回车符("\a")分隔两者:

blockquote[title][cite]:after {
  content:attr(title)"\a"attr(cite)
}

要使元素在后面有换行符，为它赋值:

显示:块;

块级元素之后的非浮动元素将在下一行出现。许多元素，如<p>和<div>已经是块级元素，所以您可以只使用它们。

But while this is good to know, this really depends more on the context of your content. In your example, you would not want to use CSS to force a line break. The <br /> is appropriate because semantically the p tag is the the most appropriate for the text you are displaying. More markup just to hang CSS off it is unnecessary. Technically it's not exactly a paragraph, but there is no <greeting> tag, so use what you have. Describing your content well with HTMl is way more important - after you have that then figure out how to make it look pretty.