Structuring page content with heading levels (h1, h2, etc.).
使用多级标题(h 1,h2，等等)结构化页面内容。
It's standard practice that h1 text is bigger than h2, and header text is bigger than paragraph text.
标准做法是h1的文字大于h2的文字，头部文字大于段落文字。
The section headings (h1 and h2) appear at the same level as the paragraphs, with no structural tags to group the sections.
小节标题（h1和h2）出现在与段落相同的级别，并且未使用结构标记对小节进行分组。
Organizing content logically using meaningful headings such as h1 and h2 creates affordance, because readers habitually scan headings before reading the text.
使用h1和h2这样的实义标签来按照逻辑关系组织内容，有助于形成可访问性，因为读者总是习惯在阅读文字前先扫描标题。
For those users, you need to hide the unordered list you added to the document, remove the borders and padding you added to your content sections, and restore the visibility of your h2 elements.
对于这些用户，需要隐藏前面添加的无序列表，删除在内容部分中添加的边框和填充，恢复显示h2元素。
主标题 (H1或者H2)
This is the energy level diagram of H2.
这是H2的能级图。
H2 viruses may also pose a pandemic threat.
H 2病毒也可能造成大流行的威胁。
The question now is, is H2 stable or will it not form?
现在的问题是，H2稳定吗，它到底会不会形成？
By default, it will use H2 which needs no additional setup.
在没有进行额外配置的情况下，它默认使用H2。
What is the energy change going from two atomic hydrogens to one H2?
什么是能量的改变，从两个原子氢到H2分子？
Metoclopramide, in conjunction with an H2-receptor blocker, may be more efficacious.
胃复安联合h - 2受体阻断剂或许更有效。
Later on, we'll learn that hydrogen as we typically encounter it is H2, the molecule.
之后我们知道，氢气是H2，是一个分子。
H2 is formed when two hydrogen atoms come together and bind to one another to make a molecule.
当两个氢原子相遇并彼此结合在一起，便形成了氢分子。
The H2 suboptimal control for continuous-time descriptor systems with dynamic output feedback is studied.
研究具有动态输出反馈的连续广义系统的H2次优控制问题。
Earlier this week, Nocera reported devising a cheap catalyst that USES three different metals to form H2.
这周初，Nocera报道发明了一种廉价催化氢气形成的催化剂，使用了3种不同金属。
Generally the first step in the GTL technology is the production of synthesis gas (H2 and CO) from natural gas.
天然气炼油技术的第一步一般是由天然气生产合成气(H2和CO)。
The explosive characteristics of the air system containing binary explosive gas mixture of H2 and CO were studied.
对H2，CO双元爆炸性混合气体的爆炸特性进行了系统的研究。
We've put the entire post title into an H2 heading and added the phrase "Post Title" to the beginning of the post title.
我们将整个文章的标题放到了一个H2标题中，并且在文章标题的开头添加短语“文章标题”。
The scientists are working on ways to recombine the protons and electrons back into hydrogen atoms and then molecules of H2.
科学家们目前正在研究使质子和电子重新组合为氢原子的方法，再使原子变为H2分子。
Microbial conversion of organic wastewater to generate H2 has some advantages such as energy-saving and environment-friendliness.
利用微生物转化有机废水产氢具有节约能源和环境友好的优点。
Hydrogenation: Chemical reaction between molecular hydrogen (H2) and another element or a compound, usually in the presence of a catalyst.
氢化：通常在有催化剂的情况下，氢分子(H2)与其它元素或化合物之间的化学反应。
The results show that backward electron emission yield deviates from inverse cosine law, due to the role of the valence electrons of H2 +.
研究发现背向的电子发射产额不满足余弦关系，这是由于H2 +上的价电子所引起的。
Objective To know the sensity of H1 and H2 receptors on hepatic tissues of cir-rhotic rats and cirrhotic patients with portal hypertension.
目的了解H_1和H_2受体在肝硬变门静脉高压症大鼠和病人肝组织中的变化。
On the hotel website make sure that the keyword density, H1 and H2 headers, page titles and meta data reflect best practices and latest trends.
确保酒店网站的关键词、H1和H2标签、页面标题和元数据反映了最新趋势和应用实践。
Objective to observe the clinical therapeutic effect of acupuncture combined with H2-receptor blocker on helicobacter pylori-related gastritis.
目的：观察针刺配合h 2受体拮抗剂二联法治疗幽门螺杆菌相关性胃炎的临床疗效。
Objective to observe the clinical therapeutic effect of acupuncture combined with H2-receptor blocker on helicobacter pylori-related gastritis.
目的：观察针刺配合h 2受体拮抗剂二联法治疗幽门螺杆菌相关性胃炎的临床疗效。
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