This threshold can either be at the warning or alarm level.
阈值可以在警告或警报级上设置。
To check this, we turn down the threshold level.
为了检验这一点，我们把阀值调低。
There is a threshold level of income which is completely free of income tax.
完全不用支付所得税有一个基准。
There is a threshold level of income which is completely free of income tax.
完全不用支付所得税有一个基准。
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