1. 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。
2. It is your computers first line of defense. 它是你的电脑第一道防线。
3. A positive attitude is your first line of defense. 积极的态度是你的第一道防线。
4. It is the first line of defense against disease. 是防御疾病的第一道防线。
5. Error messages are your first line of defense as a developer. 出错消息是作为开发人员的第一道防线。