Communicable diseases have been a curse of mankind since time immemorial.自古以來,某些傳染性疾病就是人類的災禍.Some communicable diseases are transmitted only through the agency of vermin or insects.某些傳染病只通過害蟲和昆蟲來傳播.Some communicable dise...
Some communicable diseases are transmitted only through the agency of insects.某些傳染病只通過昆蟲來傳播.Some communicable diseases are transmitted only through the agency of vermin or insects.某些傳染病只通過害蟲和昆蟲來傳播.Communicable diseases h...