Sound: play open strings alone; play slow scales, sustaining a 20- to 30-second bow; practice everything in the lower or upper half; or watch your contact point in the mirror.
音色︰只用空弦拉奏；慢慢地拉奏音阶，一弓维持在20-30秒；所有以上半弓或下半弓练习；或对着镜子看（弓的）接触点。
Sound: play open strings alone; play slow scales, sustaining a 20- to 30-second bow; practice everything in the lower or upper half; or watch your contact point in the mirror.
音色︰只用空弦拉奏；慢慢地拉奏音阶，一弓维持在20-30秒；所有以上半弓或下半弓练习；或对着镜子看（弓的）接触点。
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