with the sharpness like a knife
像刀一样锋利
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With their greater infrequency the sounds increased in strength and sharpness. They hurt his ear like the trust of a knife;
随着频次变少，声音变得越来越大，越来越尖锐，像刀子一样刺痛他的耳朵；
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