1.
Sometimes formal English and informal English are undistinguished.
有时候正式英语与非正式英语很难分清。
2.
The Study of the Chinese Students Acquisition of the English Formal/Informal Expressions;
中国学生正式/非正式英语语气习得情况研究
3.
Sometimes formal English and informal English must be carefully distinguished.
有时候正式英语与非正式英语要十分小心地加以区分。
4.
(British informal) exhausted or worn out.
（非正式英语）疲惫的或精疲力尽的。
5.
(British informal) very poor in quality.
（非正式英语）质量非常差的。
6.
The informal English used in Singapore is
在新加坡使用的非正式英语
7.
The Impacts of the Internet on the Prevalence of the English Vocabulary in the New Era--By Elucidating the Newly Authorized English Word―Google;
新时期网络对英语词汇传播的影响——从Google成为正式英语词汇谈起
8.
(British informal) enormous.
（英国非正式用语）巨大的。
9.
Official documents will be written in English.
正式文件以英语为准。
10.
English and Chinese are the official language of the symposium and workshop.
研讨会将英语和汉语作为正式语言。
11.
Language Variations in Formal and Informal Business English Writing;
商务英语写作中正式和非正式文体的语言差异
12.
(British informal) poorly ventilated.
（不正式的英国英语）不通风的。
13.
Standard English:Received Pronunciation (RP);
标准正统的英式英语:Received Pronunciation (RP)
14.
English sentences with inanimate subjects are a typical sentence pattern in formal written English.
英语无灵主语句是英语正式书面语中的一种典型句型。
15.
(British informal expletive) Well I'm jiggered!
（英语中非正式的感叹词）“我大吃一惊
16.
A Comparative Study of Formality in English Abstracts by Native Writers and Non-native Writers;
中英学术论文英文摘要语体正式度对比研究
17.
A Comparative Analysis of Formality in Argumentative Writings Written by Chinese and American College Students;
中美大学生英语议论文语体正式程度对比分析
18.
On the Regularization of Contemporary American Slang Study in English Teaching;
论当代美国俚语在英语教学中的正式化学习