是由于

• Presumably these are caused by the existence of tautomeric forms .
  这可能是由于这些化合物存在互变异构体所致。
• This transformation has been due primarily to a technological revolution .
  这种变革主要是由于技术革命引起的。
• The last equality follows because we are dealing with real functions .
  最后等式的成立是由于我们处理的是实函数。
• However, through this glorious affair i got my appointment .
  不管怎么说，我是由于这一光荣的业绩才能得到委任的。
• The brilliance of diamond is due in part to its large dispersion .
  金刚石的光辉异彩，部分是由于它有强烈的色散。
• The effect is caused by the escape of electrons from the hot filament .
  这个效应是由于电子从热灯丝逸出而引起的。
• On our theory, unity of type is explained by unity of descent .
  依照我们的学说，体型的一致是由于祖先系谱的一致。
• It might have been due to his mental state, to depression and fatigue .
  大概是由于精神状态，由于忧郁和疲劳所致。
• Lucy's success is owing to her brother john in all senses .
  从所有的观点看来，露西的成功是由于他哥哥约翰的缘故。
• Allenda was brought down by his own incompetence and inflexibility .
  阿连德之所以倒台，是由于他自己的无能和固执。