And, sometimes, a time stamp or last viewed stamp does matter.

而且，有时候，时间戳或上次查看的时间确实有用。

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To help users rapidly identify the task associated with each app, the list shows a snapshot of its actual state when the user last viewed it.

为了帮助用户快速识别与每个应用程序相关的任务，列表显示了当用户上次离开应用的时候，它实际状态的快照。

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Consider what happens in your browser history when you use the Back button: the browser returns to the last viewed page, and the forward button, which was previously disabled, lights up suddenly.

想一想使用后退按钮时历史堆栈中会发生什么：浏览器返回上一次查看的页面，原来不能用的前进按钮突然之间变得可用了。

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and he knew this the same way that we saw it in the last class, which is when we viewed the difference spectra coming out from the hydrogen, and we also did it for neon, but we saw in the hydrogen atom that it was very discreet energy levels that we could observe.

那就是,当我们看氢原子发出的光谱时，我们也看了氖气,但我们看到,氢原子能级是分立的，这些，在当时,已经被观察到了,他也都知道。

麻省理工公开课 - 化学原理课程节选

The apps were using a common Web standard, known as a "referer, " which passes on the address of the last page viewed when a user clicks on a link.

WSJ: Facebook in Online Privacy Breach; Applications Transmitting Identifying Information

Last Sunday evening I viewed a hugely entertaining cabaret performance by singer and actor John Gabriel.

FORBES: Despite New Highs, 2013 May Be More Heartbreak Than Very Good Year

The analysis, based on a sample survey of voters last year, is viewed as the best source of government data on turnout by race and ethnicity.

NPR: A Census First: Black Voter Turnout Passes Whites