Even when demonstrator hens reacted with obvious disgust to a specific food, via vigorous head shaking and bill wiping, there was no evidence that observers subsequently avoided eating that food.

即使是当作为演示的母鸡对某种特定的食物表现出明显的厌恶，比如使劲摇头和擦拭嘴，也没有证据表明它们随后会避免食用这种食物。

youdao

Shaking your head for 'No' is not universal.

以摇头表示“不”，并非放诸四海而皆准。

《牛津词典》

Tamara stared at him in disbelief, shaking her head.

塔玛拉摇着头不相信地盯着他看。

《柯林斯英汉双解大词典》

Is that what you're shaking your head about, Nicola?

这就是你摇头的原因吗，妮可拉？

耶鲁公开课 - 公正课程节选

It involves shaking your head.

这包括摇头的动作。

Don't 课堂 - SpeakingMax英语口语达人

Lagarde, however, went beyond eye rolling and head shaking.

FORBES: Greek Tragedy Turns to Farce

Bonobos are already known to use head-shaking to initiate interactions with other members of the group, such as playing.

BBC: Earth News - Bonobo chimps filmed shaking their head to 'say no'

So much the better if they're right, but Mr. Romney is still entitled to some head-shaking about deal-making and political double standards.

WSJ: Review & Outlook: Warren Romney