他的右臂向头的一侧伸开，手上还紧紧握着一只咖啡杯。

His right arm was extended up beside his head, still holding on to a coffee cup.

《柯林斯英汉双解大词典》

我们的第二个研究是关于音乐的，在这项研究中，研究人员通过位于人脸两侧的扬声器向婴儿播放音乐。

Our second study is about music, for this study researchers play music to babies through speakers located on either side of a human face.

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(重复向另一侧嘴角做同样的动作)。

(Repeat for each side of the mouth unless instructed otherwise).

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