spirit level

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They explore these issues in their book, “The Spirit Level: Why Greater Equality Makes Societies Stronger.”
在书中他们深入探讨了这些问题，“精神文明：为什么伟大的平等让社会更健康。”
In spirit level, leisure sport with its culture appearance permeate worth a system in people, influence with change people the unseen.
在精神层面，休闲运动以其文化形态渗透在人们的价值体系中，影响和改变着人们的精神世界。
With the background of high technology, spirit should take the lead of the neo-unity relation between art and technology in modern design so as to improve the spirit level of art in a full scale.
在高技术的背景下，现代设计更需要以精神统领技术与艺术的新统一关系，使艺术的精神层面得到全面的提升。

Later versions of the tool filled small tubes with ethanol alcohol (earning them the name "spirit level") and encased several tubes inside a long, wide body, which could rest on different surfaces.
FORBES: No. 18 The Level
Colonel MICHAEL HOYT (U.S. Army): Praying for our strength of spirit and fatigue level would be helpful.
NPR: Chaplain Requests Prayers for Troops in Iraq

a tool that contains a tube of liquid with an air bubble in it, used to show if a surface is level

A spirit level is a device for testing to see if a surface is level. It consists of a plastic, wood, or metal frame containing a glass tube of liquid with an air bubble in it.