are part

• Antibodies were part of the r-globulin fraction of serum .
  抗体是血清r-球蛋白的一部分。
• The lacteals of villi are part of the lymphatic system .
  绒毛的乳糜管是淋巴系统的一部分。
• They were parted for years .
  他们已分别多年了。
• Intestinal suture is part of the story of abdominal surgery .
  肠管缝合是腹部外科过程的一部分。
• You're supposed to be part of a team, nancy, and i'm the coach .
  照理说，南希，你是队员，我是教练。
• A rule, however, may or may not be part of a procedure .
  总之，规则可能是程序的一部分，也可能不是。
• Our study of heat engines is part of a chain of reasoning .
  我们对热机的研究乃是一系列推导的一部分。
• His paintings are deliberately flat , it is part of his style .
  他作画刻意用单一色调，这是他的一种风格。
• To be part of this crucial anonymous work satisfied him .
  参与这个左右全局的默默无闻的工作使他感到满足。
• They are part of evolution and evolution is a part of nature .
  它们是发展的一部分，而发展又是自然的一部分。