I say, make time to dance alone with one hand waving free.

我说，让时间和我独自翩翩起舞，任手挥摆。

youdao

She struck a pose, one hand on her hip and the other waving an imaginary cigarette.

她摆出一个姿势，一只手叉腰，另一只手挥动着一支假想的香烟。

《柯林斯英汉双解大词典》

Waving the hand means saying goodbye.

挥手意味着道别。

youdao

Occasionally, a face would appear for a few seconds at a screened hole in the canvas, or a cuffed hand could be seen waving.

VOA: standard.2009.05.25

And in this quest for what is best, positive psychology does not rely on wishful thinking, self-deception,or hand waving; instead,it tries to adapt what is best in the scientific method to the unique problems that human behavior presents " in all its complexity."

在追求理想状态时，积极心理学不会盲目主观，或自欺欺人;,相反，它尝试用最科学的方法来探究,极其复杂的人类行为所表现出来的,特殊问题“

哈佛公开课 - 幸福课课程节选

Meanwhile transitional generations like ours are alternately hand waving and grumpy about it.

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How this happens has been the subject of a lot of hand waving, though the tendency of adipose tissue to produce chemicals that encourage inflammation is often mentioned.

ECONOMIST: Metabolic syndrome

We see a hand waving in the back.

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