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let the acupuncture needle remain at a certain point for a designated period of time (in order to enhance the effect of the treatment)
retention of the needle in the body
retaining needle
英汉词典共收录311570条英汉翻译词条，基本覆盖所有常用英文单词的例句及中文翻译，是不可多得的英语学习材料。