Nerve fibers and collagen are blue ( third harmonic ) and grey ( second harmonic ) , respectively .
神经纤维和胶原分别呈蓝色（第三谐波）和灰色（第二谐波）。
Music is most likely to tingle the spine , in short , when it includes surprises in volume , timbre and harmonic pattern .
简而言之，当音乐的音量、音色或和声发生出人意料的变化时，最有可能令人脊柱发麻。
But the frequencies have a special harmonic relationship , which is why you hear it as a single sound with a single pitch .
但是这些频率之间有着特殊的谐波关系，这就是为什么你只会听到只有单一音调的一个声音。
Although the harmonic techniques of the symphony were only moderately removed from 19th-century techniques , soviet authorities were displeased at the acid sarcasm they heard beneath the first movement 's jubilant surface .
Unfortunately , the forces caused by the secondary harmonic remain out of kilter as a result of the pistons having to accelerate and decelerate faster in the upper half of the cylinders than in the lower half .
