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。

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

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教师放录音，学生跟读，并模仿录音的语音语调。

Listen to the tape and read after it. Imitate the intonation carefully.

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“当然可以，”他模仿着我的低沉语调。

"Of course," he said, mimicking my hushed tone.

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