You also have to specify a duration of shaking over a given level.

同时还要具体指定震动持续时间的级别。

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We actually do use the duration of shaking to estimate the magnitude for some small earthquakes.

我们的确会使用震动持续时间来估计一些小型地震的震级。

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Finally, the damage to a given structure will depend both on the amplitude of the shaking and its duration.

最后，给定结构的损害取决于震动的振幅和持续时间。

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Finally, the damage to a given structure will depend both on the amplitude of the shaking and its duration.

最后，给定结构的损害取决于震动的振幅和持续时间。

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