like the tag
in html.
a section of a piece of writing, usually consisting of several sentences dealing with a single subject. The first sentence of a paragraph starts on a new line. 段；段落
an opening/introductory paragraph
开头的／导引的一段
Write a paragraph on each of the topics given below.
就下面所列主题各写一个段落。
See paragraph 15 of the handbook.
参见手册第 15 段。