Those who did well on the memory test had an increase in levels of immunoglobulin A, an antibody that's the body's first line of defense against germs.
那些在记忆测试中表现良好的人，其体内的免疫球蛋白 A 水平会升高。免疫球蛋白 A 是一种抗体，是人体抵御细菌的第一道防线。
3
Well, I've been out of touch with most of my old friends, only one or two still drop me a line occasionally.