a metal

• The simplest calorimeter is a metal vessel used with a thermometer .
  最简单的量热计是一个带温度计的金属容器。
• The mosaic consists of a metal plate covered with insulating material .
  嵌镶光电阴极由涂有绝缘材料的金属板组成。
• The "smoothness" of a metal surface depends on the wavelength of the radiation .
  金属表面的“光洁度”与电磁辐射的波长有关。
• The atoms themselves are firmly held in place in the crystal structure of a metal .
  原子本身被紧紧束缚在金属的晶体结构之中。
• The electron is able to travel through the crystal as easily as through a metal .
  这个电子像穿过金属一样很容易在晶体中迁移。
• It strictly means that the copies are made from an image on a metal plate .
  技术上从严来说，这些印件是按金属印版上的图像制成的。
• The oldest stars in the galaxy exhibit a metal deficiency relative to hydrogen .
  银河系中最年老的恒星表现出一种对氢而言的贫金属性。
• They won't set off a metal detector, nor do they have any distinguishing silhouette .
  它们不会触发金属探测器，也没有任何可以识别的外形轮廓。
• I was supposed to drop each ticket that i took from a customer into a metal receptacle .
  我的工作就是把从顾客手中收来的每张票都扔在一个金属箱子里。
• An instrument of the second type makes use of a metal reed kept in vibration by an electromagnet .
  还有一种类似的装置，由电磁铁维持金属簧片不断振动。