"viruses and other infective agents" "a carrier remains infective without himself showing signs of the disease"
"fear is exceedingly infectious; children catch it from their elders"
"infectious hospital" "infectious disease"
infectious是什么意思
infective是什么意思
infectivity是什么意思
infector是什么意思
infectum是什么意思
infecund是什么意思
infecundity是什么意思
infelicific是什么意思
infelicitous是什么意思
infelicity是什么意思