金刚石具有最高的声传播速度和极高的杨氏模量，以及优异的机械和化学性能，在声学方面具有广阔的应用前景。

Diamond has the highest acoustic velocity, high Young's modulus and excellent mechanical and chemical properties, so have broad application in the field of acoustic devices.

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在这期间，食品包装机械的平均增长速度达到24％，最高达37％。

For instance, the annual growth rate of the food and packaging industry has averaged 24%, with a high of 37%.

youdao

在这期间，食品包装机械的平均增长速度达到24％，最高达37％。

For instance, the annual growth rate of the food and packaging industry has averaged 24%, with a high of 37%.

youdao