'So you told her?' he said in a neutral tone of voice.

“那么你告诉她了？”他平静地说。

《牛津词典》

With a control group, the researchers made no attempt to copy behaviors; instead, they adopted a neutral tone and body language.

在另一组学生中，研究人员不模仿动作，而是采取中性的语调和肢体语言。

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In TCSL intonation teaching and learning, neutral tone is a focus as well as a difficult point.

对外汉语语音教学中，轻声是语音教学的重点和难点。

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