Soft materials do not carry sounds so well as iron and other solids.

软性材料传递声音不如铁等固体那样好。

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Soft materials, such as cloth, do not carry sounds so well as wood, iron and other solids.

像布那样的柔软的材料，不如木材、铁和其它固体东西传导声音那样好。

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They are made of a rigid material, like plastic, but some are made of leather or other soft materials.

矫正鞋垫通常由刚性材料，比如塑料、但也有些用皮革或其他柔软的材料做成的。

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The technique allows the machine to be made of soft materials so it can squeeze through tight spaces and mould its shape to rough terrain.

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The extensive use of metallic finishes and soft touch materials throughout reinforces the premium quality of the environment.

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Last month DARPA, the U.S. Defense Department's research agency, invited proposals from robotics experts to build a "chemical robot" made from soft, flexible materials and capable of squeezing through gaps smaller than its regular dimensions.

CNN: Robotics discovers its soft side