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to move your head from side to side, in order to express disagreement, sadness, or that you do not want or believe something
摇头(表示不同意、悲伤、不想要或不信)
I asked Tim if he'd seen Jackie lately but he shook his head. 我问蒂姆近来是否见过杰基，他摇了摇头。
"That's incredible!" he said, shaking his head in disbelief.
“简直难以置信!”他一边说，一边不相信地摇着头。
点头 nod /nɒd/