任何时刻，如果你有什么想问的或者有什么想补充的，请举手并左右摆动，确保我能看到你。
If at any point, you've got something you want to ask about or some two bits you want to add, raise your hand and wiggle it around to make sure I see you.
当你向下指并左右摆动手臂时，这个动作的意思是“不”。
When you point downwards and swing your arm from side to side, it means "no".
她的头有节奏地向左右摆动。
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