1. Introduction正文中的一级标题用14号times New Roman 加粗，标题在某一页的开始，段前就不再另外空行，只段后一行即可。所有标题左对齐 APA格式：每级标题下的正文第二段开始，以后每段都缩进五个字符。 APA格式：每级标题下的正文首段不缩进Idioms are thought of as the core and essence of language and culture. Any language which has a long history is abundant in idioms. Many of the words often contain enough philosophical and incisive theories for people to study and they become an important part of modern English (Zhang, 2009, p. 8). For example: “As a man sows, so he shall reap” can b
