In this case, I rotate the line around the center of the movie with the code shown below.

在本例中，我用下面所示的代码使这条直线围绕动画的中心旋转。

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Listing 16 shows the code to add the Justify Center formatting button.

清单16显示添加中间对齐格式按钮的代码。

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You'll want to center the QR code inside that display so that it can be read by Barcode Scanner.

你要把二维码置于这个区域的中心，让“条形码阅读器”能够读取。

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Local in-person tax preparation and filing assistance at free local tax help centers (find a free center near you using the zip code tool) or call 2-1-1 to schedule an appointment.

FORBES: If You Qualify, File Your Taxes For Free

With its unique user interface complete with colorful Live Tiles, the next version of Windows Phone, code-named Mango, puts people front and center making it easier to connect and share with friends, family and colleagues so important moments are never missed.

ENGADGET: AT&T announces Windows Phone Mango lineup coming this fall, existing devices to be updated

If you have already created code for laying out labels according to the bottom or center point, your text will move around a little and you will need to adjust your constraints.

ENGADGET: Apple seeds iOS 6 beta 4 to developers: here's the changelog