为测试这项理论，心理学家把目光转向了肉毒杆菌，他们用这种毒素使控制皱眉的肌肉麻痹无力。

To test the theory, psychologists reached for the botox. They used the toxin to _deaden_ the muscles that control frowning.

youdao

为测试这项理论，心理学家把目光转向了肉毒杆菌，他们用这种毒素使控制皱眉的肌肉麻痹无力。

To test the theory, psychologists reached for the botox. They used the toxin to _deaden_ the muscles that control frowning.

youdao