u VOCABULARY 1. rogue adj. behaving in a different way from other similar people or things, often causing damage 行为失常的;暴戾的。例如: a rogue gene 变异基因 2. respiratory adj. connected with breathing 呼吸的。例如: respiratory diseases 呼吸道疾病 3. symptomatic care 对症护理 4. vaccine n. [ 可数名词 , 不可数名词 ] a substance that is put into the blood and that protects the body from a disease 疫苗。例如: a measles vaccine 麻疹疫苗 5. on the alert 警戒着, 随时准备着, 密切注意着