1、 Hemagglutination is a process where red blood cells agglutinate or clump together due to certain substances or antibodies present in the blood.
血凝素是一种红细胞因血液中的某些物质或抗体而聚集或凝集在一起的过程。

2、 Hemagglutination inhibition is a laboratory technique used to measure the presence of specific antibodies in a serum sample by observing the inhibition of red blood cell agglutination in the presence of the antibodies.
血凝抑制是一种实验技术，通过观察抗体存在时红细胞凝集的抑制，来测量血清样本中特定抗体的存在。