But in a short period of time can be approximated as smooth.
但在短时间内可近似看作是平稳的。
For different soil depths, the amplitude of temperature daily variation can be approximated as an exponential function of the depth.
一日内地温变幅与深度关系可拟合成指数函数。
Experiments on simultaneous mask effect where tones were masked by narrow-band noises with different SPL showed that the masking curve could be approximated as two segments of straight line.
不同声压级下窄带噪声对纯音同时掩蔽效应的实验结果表明：掩蔽曲线可以用两段直线来近似。
Experiments on simultaneous mask effect where tones were masked by narrow-band noises with different SPL showed that the masking curve could be approximated as two segments of straight line.
不同声压级下窄带噪声对纯音同时掩蔽效应的实验结果表明：掩蔽曲线可以用两段直线来近似。
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