材料

• Rubber is an elastic material .
  橡胶是一种弹性材料。
• A laser is a device composed a special material .
  激光器这种器件是用特殊材料制成的。
• The material must be moderately coherent and firm .
  材料必须有适度的粘着力和坚固性。
• The material in the large plastic zone has been hardened .
  在大塑性区内材料已经硬化。
• As promised, o'keefe had documented his charge .
  奥基夫如约把他的揭发写成了书面材料。
• As a rule these materials do not show hysteresis .
  一般说来，这些材料不显示磁滞现象。
• Accreditation is also hampered by several other factors .
  鉴别材料还受到一些别的妨碍。
• They produced leaflets, around a hundred in all .
  他们搞了一些活页材料，总共大约100页。
• Copper conducts electricity better than other materials do .
  铜的导电性能比其他材料好。
• Please send us the material at once , it 's urgently needed .
  请把材料赶紧送来，有急用。