"Brian and I were both science students. You know science sort of math and physics side, you know"

John Deacon is referring to the 2 of them being science trainees, which is a broad discipline that consists of mathematics and physics. He is emphasizing the value of the two subjects, as they are vital elements of the science field. He is likewise indicating that the 2 of them have a strong understanding of the two subjects, which is why they picked to pursue a profession in science. By discussing the two subjects, he is likewise highlighting the importance of having a strong structure in mathematics and physics in order to succeed in the science field. He is likewise recommending that the 2 of them have a strong understanding of the two topics, which is why they picked to pursue a profession in science. This quote is a testament to the significance of having a strong structure in mathematics and physics in order to be successful in the science field.