Concrete is used in combination with other distinctly different materials, such as steel reinforcing bar, polypropylene fibers, and high-strength wires to produce different types of concrete.
具体是用在与其他组合明显不同的材料，如钢筋，聚丙烯纤维钢，高强度混凝土生产线，以不同的类型。
Membrane materials with special functional features or combination of different types of materials can also be used to regulate the drug release rate of the pellets.
还可利用衣膜材料不同的功能特性或不同类型材料的组合调节药物的释放速率。
Anchoring to the surface will probably be necessary, but asteroids are made up of different materials - some solid metal, some piles of rubble and some, a combination of rock, pebbles and dust.
锚定表面可能是必要的，但小行星是由不同材料构成-一些固体金属，一些瓦砾和一些的岩石，鹅卵石和尘埃的组合桩。
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