几乎所有的音乐体系都是基于所跨越的八度音阶范围——这一音符的发音同开始时的完全一样，只是音高或高或低。
Almost all musical systems are based on scales spanning an octave-the note that sounds the same as the one you started off with, but at a higher or lower pitch.
这方面例子的范围包括从食物或水供应的污染，到空气或噪音高度污染、化学事故、疾病暴发或自然灾害。
Examples range from contamination of the food or water supply, to high levels of air or noise pollution, a chemical accident, a disease outbreak or a natural disaster.
为了帮助说明你听到和制作的群组范围，当听到你新的音乐片段时请仔细看这些音高(在编辑视窗，数字或字母)。
To help account for the grouping boundaries you hear and make, look carefully (in the Edit Window, by number or by letter) at the given pitches while listening to your new block.
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