What we need is a system, and that is what has been really lacking.

我们需要的就是这样一个系统，而这正是一直所缺乏的。

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If the system is rough on the outside (for example, lacking error handling and stability), the customer might become nervous about the team.s progress.

如果系统从外表上看是很粗糙的(比如，缺乏错误处理和稳定性)，客户也许会对团队的进度感到不安。

youdao

Many Linux users are finding the dual-boot mode of using Microsoft Windows to be lacking in interoperability with their Linux system.

许多Linux用户发现Microsoft Windows的双引导模式缺乏与Linux系统的互操作性。

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But in an era of plastic explosives and advanced chemical compounds, that system has proved lacking.

VOA: standard.2009.12.30

Lacking a computerized system to track information about power outages, LIPA relied on an outmoded system of paper maps, photos and Post-it Notes to coordinate its service efforts with National Grid.

WSJ: Blizzard Barrels Toward Area

In a column Spitzer wrote for Slate last summer, he used the case as an example of a financial system still lacking sufficient government regulation.

FORBES: Why Did It Take So Long to Sue the AG?

And those who dared object were dismissed as lacking faith in the American system.

CENTERFORSECURITYPOLICY: Center For Security Policy