11. nod = nod your head 点头
(1) If your answer is yes, nod your head.
如果你的答案是“是”，就点点头。
亦可用If you answer yes, nod.
(2) She nodded yes.
她点点头，表示同意。
亦可用She nodded her head yes.
12. Shake your head 摇头
If your answer is no, shake your head.
如果你的答案是“不”，就摇摇头。
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