It means to achieve two goals with one action.

“一箭双雕”比喻做一件事达到两个目的。

youdao

Each peak in the Fourier transformed spontaneous emission rate corresponds with one action of photon closed-orbit going away from and returning to the atom.

自发辐射率的傅立叶变换中的每一个峰和光子从原子出发到返回原子的一条闭合轨道相对应。

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The book looks to have the atmosphere of study quite in the school, efficiency nature tower above is not little, the hope is ok breakthrough of with one action.

在学校看书比较有学习的气氛，效率自然高出不少，希望可以一举突破。

youdao

That is,we can complete two goals with only one effort or action.

VOA: special.2009.07.26

The reader should prefer a story with action and dialog to one with none."

读者要偏爱有动作和对话的故事,而不是没有这些元素的“

耶鲁公开课 - 1945年后的美国小说课程节选

Whatever your desired financial state, try coming up with one small action step that can bring you closer to that vision in the coming month, and give yourself fewer reasons to worry.

FORBES: Let Your Money Worries Set You Free

The action concludes with one of the great last lines of recent times.

NEWYORKER: Sun Don't Shine

So today, I wanted to share with you two thoughts and one action step to help you hear and meet your own true hunger.

FORBES: Release False Beliefs (to hear your true hunger)