真机的部分稳定性试验表明，机组存在较宽的水力振动区；

The stability test on real turbine showed that the generating unit has a wide hydraulic vibration area.

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项目使用了小料混合，使混凝土能够放进模板的封闭区而不会振动。

Using a small aggregate mix enabled the concrete to be placed into the blind areas of the formwork with no vibration.

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许多有机分子作为固有振动频率相同的飞行情报区。

Many organic molecules have the same intrinsic vibration frequency as FIR.

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