表面上，这是一款“增强现实”的手机应用，在手机照片的纽约天际线上描出曾经的世贸双子塔。
On the surface, it's an 'augmented reality' app that superimposes the Outlines of the former World Trade Center towers in mobile photos of the New York skyline.
“当人们想要一个天际线玻璃球时，他们要么想要还有双子楼的，要么想要没有双子楼的，”Harkrader说。
"When people are looking for a snow globe with a skyline, they either want the twin towers or they don't," Harkrader said.
NYCWebStore的天际线玻璃球产品包括了到2004年为止的双子楼，至此之后改为反映后911时期的天际线。
NYCwebStore's skyline snow globes included the twin towers until 2004, but have since changed to reflect the post-September 11 skyline.
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