Right, It needs much practice to play single notes.
是呀，单音就是需要多练习的。
So how long does it take to archive one single Notes E-mail?
那么归档一封Notes电子邮件要花多少时间呢？
When beginning, it is best to attempt single notes on holes 4 to 7.
刚开始的时候，最好从4到7孔的单音开始练习。
Product Notes: single-stage regulator valve for the high pot.
产品备注：为单段调节气阀高速锅。
Product Notes: single-stage regulator valve for the high pot.
产品备注：为单段调节气阀高速锅。
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