Be sure the mesh is securely attached to the top rail and floor plate.
确保网格是安全的重视顶端铁路和地下板。
When attached securely to a steady body, you have a much more stable reference platform.
当你把钢琴弹奏安全地依附于一定态的身体，你就有了这样一个稳定得多的参考平台。
When attached securely to a steady body, you have a much more stable reference platform.
当你把钢琴弹奏安全地依附于一定态的身体，你就有了这样一个稳定得多的参考平台。
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