subtropicyoudaoicibaDictYouDict[subtropic 词源字典]
"= subtropical", Mid 19th cent.; earliest use found in Annals and Magazine of Natural History. From sub- + tropic, perhaps after German subtropisch or scientific Latin subtropicus (both 1823 or earlier). Compare French subtropique, Danish subtropisk.[subtropic etymology, subtropic origin, 英语词源]