Basic operation rules have been established, including addition, positive scalar multiplication, cancellation law for addition and so on.
基本的运算法则已经形成，包括加法运算、数乘运算、加法的消去律等。
According to the rules of music vibration, we know that octaves of the fundamental vibration are created through multiplication or division from the number two.
遵照音乐波动的法则，我们知道基本振动的八度音阶是通过数字2的乘法或除法创造出来的。
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