本文给出高超音速湍流分离不稳定特性的实验研究结果。

This paper presents the results of an experimental study of the unsteady nature of a hypersonic separated turbulent flow.

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由于二次调节的开环不稳定特性，必须为其设置自动调节系统。

Automatic regulation must be added owing to the unstable characteristics of the open loop secondary system.

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研究直升机悬停状态时其动力学模型非最小相位且不稳定特性的设计问题。

A study on the method of design is presented for helicopter hover with nonminimumphase unstable characteristics.

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What bothers Socrates most about our democracy is a certain kind of instability, its tendency to be pulled between extremes of anarchy, between lawlessness and tyranny.

苏格拉底对我们民主最感困扰的是,不稳定性，倾向于失序两端,拉扯的特性，即介于目无法纪与专制之间。

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