be caused by

• The microcracks can be caused by friction, mechanical treatment, thermoelastic forces, etc .
  微裂纹可能是因摩擦、机械作用、热弹性力等等原因所造成。
• Many failures in planning have been caused by a lack of understanding of the fundamentals .
  大多数计划的失败，究其原因，就是因为缺乏原理方面的知识。
• The so-called lunisolar precession is caused by the inequality of the moments of inertia of the earth .
  所谓日月岁差，是由于地球转动惯量的不相等造成的。
• It seems likely that the drug resistance is caused by permeability changes rather than enzyme deficiency .
  抗药性似乎是由渗透性改变而不是酶缺损而引起的。
• Acute respiratory insufficiency in the postoperative patient may be caused by defective ventilation .
  手术后病人的急性呼吸功能不全，可因不足的通气所引起。
• The three vertical lines at the bottom of this multispectral band were caused by static in the camera .
  照片底部的三条垂直线条是照相机内的静电作用产生的。
• Swine pox, which belongs to the pox disease complex, is caused by two antigenically different poxviruses .
  猪痘属于痘病群，是由两种抗原上不同的痘病毒引起的。
• In many porphyry copper deposits, additional enrichment of the metal has been caused by surficial weathering .
  在许多斑岩铜矿矿床中，地表风化使得金属铜进一步富集。
• Several different types of troubles may be caused by improper conditions in the evaporative-emission-control systems .
  蒸发控制系统的不正常工况能引起不同类型的故障。
• These interior tensions are caused by the wedging action within the neighboring compressively stressed layers .
  这些内部的拉应力是由邻近压缩应力层内的劈开作用而引起的。