Among the various commercially available products to design virtual reality applications, WorldToolKit (WTK) was selected, due to its capabilities to overlay simulations with live camera data.

• 在各种各样的可供选择的对虚拟现实技术的开发与应用的商业产品中，我们选择WTK，是因为它能将模拟仿真建立在现场图像数据上。