Her hair is troublesome and curly ... It falls in long, black strands, but each strand has a gentle, complicated undulation travelling through it, li… - Amit Chaudhuri

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Her hair is troublesome and curly ... It falls in long, black strands, but each strand has a gentle, complicated undulation travelling through it, like a mild electric shock or a thrill, hat gives it a life of its own; it is visually analogous to a tremolo on a musical note.