Thirteen is not divisible by any even number.13不能被任何偶数除尽。8 is divisible by 2 and 4, but not by 3.8可被2和4除尽，但不能被3除尽。Twenty-eight is divisible by seven.28 可以被 7 除尽。He argued that all matter was infinitely divisible.他坚持所有物质都...
单音调 、 双音调和三音调已被充分讲解.Single, Dual and Tri Tones have been defined in full.可以演奏双音.Double tones can be played on it.钢琴的旋律, 由单线条到双音, 再转化为[音丛].The melody of the piano develops from line, through intervals, to the tone cluster...