对于单一的乐器，比如钢琴独奏会，一个回声时间短的房间更好。

For a single instrument, say something like a piano recital, a room with a short reverberation time is better.

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单一性钢琴教学模式在组织形式上实行师生一对一教学，且教学目标、内容单一，教学效益较低。

The oneness of the piano teaching mode shows in several aspects such as one-to-one instruction, the simplicity of teaching content and objective and low teaching efficiency.

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