加线为较短的水平线，用以表明音调在五线谱之上或之下。
Ledger lines or leger lines are short horizontal lines used to indicate notes that lie above or below the stave.
当一个声部移至另一声部之上或之下时就出现了声部交错。有必要把特定旋律线放在特定声部里。
Voice crossing takes place when one voice goes above or below another. This may be necessary to preserve a particular melodic line in a particular voice.
斜纹组织中，经纱位于（或浮于）两根纬纱之上，然后位于一根纬纱之下。
The warp yarn goes over, or floats over, two filling yarns and under one in the 2/1 twill.
斜纹组织中，经纱位于（或浮于）两根纬纱之上，然后位于一根纬纱之下。
The warp yarn goes over, or floats over, two filling yarns and under one in the 2/1 twill.
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