Public pyjama-wearing is said to have started decades ago when having two changes of clothes - one for night and one for day - was a sign of wealth and something to be flaunted.

睡衣外穿据说源自几十年前，彼时人们终于得偿所愿能有两套衣服换着穿——白天一套晚上一套——这在当时可是富裕起来的标志，值得大肆炫耀。

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The initiative, by a group of organizations that included the Mumbai Arts project (MAP), which is dedicated to creating public art projects, is just one sign that Mumbai's art scene is on the rebound.

这个活动是由孟买艺术团体发起的，其中有孟买艺术项目(MAP)组织，他们致力于推动当地的公共艺术活动开展，这都显示了孟买的艺术活动正在兴起。

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But one sign of change is the commission’s call for new laws to exclude China from Europe’s public-procurement tenders if it does not allow similar access at home.

发生变化的标志是，如果中国不允许其国内有类似的准入市场，欧盟委员会要求制定新的法律来将中国排除在欧盟的公共采购投标商之列。

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At a recent discussion about illegal drugs at the James A.Baker Institute for Public Policy at Rice University, DEA intelligence chief for the Houston sector,Gary Hale, said one sign of progress is that the cartels are seeking other sources of income, with drugs comprising only about "What does that mean?

VOA: standard.2009.12.18

The mobile industry is currently collaborating on a new wi-fi protocol called PassPoint which will allow consumers to use one sign-in to join any public wi-fi network, wherever they happen to be.

BBC: Data jam threat to UK mobile networks

When people will take a side against their own self-interest, it is a sure sign that one side has done a masterful public relations job while the other has failed miserably.

FORBES: Public Employee Unions Failing Badly At Public Relations