Johnson says that her students, over the past several years, have increasingly used a more informal English vocabulary in formal assignments.

VOA: standard.2010.01.16

All right, so before I begin I just want to say I want to keep this pretty informal so feel free to jump in if you have comments, questions if you disagree with me.

在我开始之前,我想说,不需要那么正式,如果大家有什么见解或者问,如果大家有什么不同意见,希望大家有一些不同的见解。

麻省理工公开课 - 电影哲学课程节选

Well, that's pretty difficult. It, you know, I think it's easiest to do that in sort of an informal way.

分配起来确实挺困难的。你知道的，以一种非正式的方式反而更容易做到。

有趣的室友们 - SpeakingMax英语口语达人

International Labor Organization,ILO, figures say almost 80 percent of Thailand's female workforce fall into the informal sector category, many in areas outside Thailand's labor protection laws.

VOA: standard.2009.03.09

now we're not just talking about 1 photon, 1/2 let's say we shoot them all at the same time at our metal, each of them having some energy that's let's say 1/2 the work function. So, just to take a little bit of an informal survey, who thinks here that we will have an electron that is ejected in this case?

我们现在不仅仅讨论一个光子，它们所具有的能量是功函数的，我们在同一时刻把它们打到金属上,我们做一个不太正式的调查,谁认为这种情况下,一个电子会被打出？

麻省理工公开课 - 化学原理课程节选

"A science caf, it's a concept that actually started in Europe, and it was an idea to get scientists engaged in an informal conversation with the general public."

VOA: standard.2010.05.04

"We are finding that this is not only in the backward economy of developing countries, even though most forced labor today is indeed in the informal or the background agricultural sector of Asia, Latin America and then Africa."

VOA: standard.2009.08.21

And women are three times as likely as men to work in informal economies, and therefore abuse,sex trafficking and the absence of legal rights and protections for women are still unacceptably commonplace in so many places around the world."

VOA: standard.2010.04.28