Notice how these small changes make you feel more alert and present.

仔细体会这些细小的改变，它们令你变得机警、感到活在当下。

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If we are alert enough, we'll notice that we are always on guard.

如果我们足够警惕，你会发现我们经常是在站岗。

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Run your page again and notice that you now have to click on an image to get the alert box to pop up.

再次运行页面并注意，现在必须要单击每个图像以弹出警告框。

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In an advanced system, transit system operators would be able to notice bus bunching conditions before the buses meet, give green lights to the front bus and alert riders to the presence of emptier buses following the first.

FORBES: Busting Bus Bunching With Traffic Signals