Shine one in someone's face, and your target should immediately get the message that it's time to back off.

对着人脸部一闪，你的目标会马上收到撤退时间的情报。

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By looking through a face on the target mesh, as if it where a window, you should be able to see every polygon on your source mesh pointing more or less in your direction.

通过察看目标网格上的一个面，比如窗户那里的面，你将可以看到在你源网格的每一个多边形或多或少的指向你的方向。

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To achieve that target, we face serious challenges.

为实现上述目标，我们面临着艰巨的任务。

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Whether to offer face-to-face advice is, in fact, a fiercely debated issue among financial institutions that target the mass affluent.

ECONOMIST: Banking for the well-off

The challenge many apps face is determining what the target demographic is, before bringing product to market.

FORBES: The Wild West of Licensing: Retailers Hesitant to Put the Cart Before the Angry Bird

To be sure, Wal-Mart and Target, two other massive big-box retailers, face this problem.

FORBES: Move up http://i.forbesimg.com t Move down