Retelling training is one of the effective methods for foreign language study. It mainly concludes sound materials retelling training and reading materials retelling training.

复述是一种有效的外语学习方法，它主要分为对语音材料的复述和对阅读材料的复述。

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The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.

他收集的数据得出了一个关于房间回声持续时间、吸音材料的数量和质量以及空间体积之间关系的数学公式。

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These manmade materials play with the laws of physics; their meta-structures bend light and sound in unusual ways.

这种人工材料可以玩弄物理定律：超介质可以以不同寻常的方式弯曲光和声音。

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The essential ingredients of good open-plan office acoustics are evenly distributed sound-absorptive materials and a minimum level of background noise throughout.

BBC: The pleasures and perils of the open-plan office

Jazz can still be the sound of surprise even when its materials are familiar.

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The S3-BT speakers are based on an essential, time-honored principle: good sound depends on intelligent design and superior materials.

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