We reported the main progress made in China in recent years of the study of ultrasonic tissue characterization-propagation velocity, attenuation, scattering and nonlinearity parameter, etc.

本文报道了近年来我国在生物组织超声特性——传播速度、衰减、吸收、反射、散射和非线性声参量方面的研究进展情况。

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Besides bandwidth and latency, what other parameter is needed to give a good characterization of the quality of service offered by a network used for digitized voice traffic?

数字化的语音所经过的网络，除了对带宽和延迟有要求之外，还有什么参数影响它的服务质量？

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Permeability is an important parameter for a oil reservoir characterization and engineering.

率 是油藏描述和油藏工程中一关键性的参数。

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