m元素表示文本被“加上标志”，但是不一定要强调。
The m element indicates text that is "marked" somehow but not necessarily emphasized.
很多书写用字母(比如：法语)需要上标或下标才能正确展示。在这些情况下，SUB和SUP元素应该用来标记文本。
Many scripts (e. g., French) require superscripts or subscripts for proper rendering. The sub and sup elements should be used to markup text in these cases.
中间划线，上标，下标元素。
如果我们查阅图表，一级电离能，已经在元素周期表上标示了。
Well, if we look on the chart, the first ionization energy is what is reported in your Periodic Table.
一个屏幕上标尺可以看到以可视方式多少像素的每个元素使用。
An on-screen ruler lets you see visually how many pixels each element USES.
一个屏幕上标尺可以看到以可视方式多少像素的每个元素使用。
An on-screen ruler lets you see visually how many pixels each element USES.
应用推荐