The agglutinate substance occurred because you left the two chemicals under the heat too long.因为你使这两种化学品受热太久，所以产生了凝集物质。The herb has been shown to hinder platelet aggregation.这种草药已被证实可以抑制血小板凝集。In a positive result the red cells agglutinate, resulting in a visible alteration of the appearance of the sample.在阳性的结果中，红细胞凝集，使样品的外观产生可见的变化。