I never found the missing piece.

我一直没找到丢了的那件。

《牛津词典》

The one big missing piece has been offline access.

离线访问会使得一大段文章丢失。

youdao

He gives up the missing piece, and Scylla boots up.

他交出了藏起的零件，“锡拉”被启动了。

youdao

It had been fixed with a piece of blue paper and the upper right hand corner was missing.

VOA: special.2009.01.17

What's missing in this model of this piece of soccer, this game within a game?

在这个足球的模型中我们忽略了什么,这是一个博弈的模型对吧

耶鲁公开课 - 博弈论课程节选

Now with LeRoi Moore gone, a piece of the puzzle is missing.

VOA: special.2009.08.28

Pinterest Inc. is getting ready to add a missing piece to its business: revenue.

WSJ: As Pinterest Grows, Startup Seeks $2.5 Billion Valuation

The employee innovation network is the other missing piece needed for organizations to achieve speed and agility.

FORBES: The Secret Formula for Corporate Strategy Execution: Part 2

So the missing piece for Peace: resolve the underlying cause of strife rather than tussling with the symptoms.

FORBES: To Bring True Peace To The Middle East, Women In Palestine And Israel Must Take Center Stage