First, simply be aware of yourself sitting in a cylinder of light.
首先，仅是知道你自己坐在光的圆柱中。
This is that first wax cylinder phonograph.
这是第一次蜡筒留声机。
First, the elliptic cylinder mathematical model has been built by space analysis.
首先用空间解析法建立了椭圆柱形物体的数学模型。
First, the elliptic cylinder mathematical model has been built by space analysis.
首先用空间解析法建立了椭圆柱形物体的数学模型。
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