Its application needs only frequencies and damping ratios of closed-loop and flexible modes and can be used to eliminate arbitrary vibration modes simultaneously.

应用该方法仅需要知道闭环系统及柔性振动的频率及阻尼，而且可以同时抑制任意多个振动模态。

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Unfortunately, in just four days, Congress is poised to allow a series of arbitrary, automatic budget cuts to kick in that will slow our economy, eliminate good jobs, and leave a lot of folks who are already pretty thinly stretched scrambling to figure out what to do.

WHITEHOUSE: President Obama Speaks to National Governors Association