快三在线
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科学原理：传感器应用 站在这面神奇的世界地图前，只要我们将手指轻轻地指向某一国家，音箱里↓就会用普通话告诉我们这是哪个国家，并用该国的官方语言向我们“问好”。 尺寸：1800*1200*180
