What is a pidgin and how may it be distinguished from a Creole？

正确答案：A pidgin is a variety of a language that is not a native language of anyone but is learned on contact situations such as trading. A pidgin is usually based on one language though it soon takes on substances of other languages. It usually has a limited vocabulary and much reduced grammatical structure which may expand when it is used over a long time or for many purposes. Sometimes a pidgin dies out of its own accord. When a pidgin develops beyond its role as a trade language and becomes the first language of a social community it becomes a Creole. Creole has large numbers of native speakers and is not restricted at all in their use. Once a Creole is in existence it may continue almost without change; it may evolve further into a normal language or gradually merge with its base language through decreolization.
Apidginisavarietyofalanguagethatisnotanativelanguageofanyone,butislearnedoncontactsituationssuchastrading.Apidginisusuallybasedononelanguage,thoughitsoontakesonsubstancesofotherlanguages.Itusuallyhasalimitedvocabularyandmuchreducedgrammaticalstructurewhichmayexpandwhenitisusedoveralongtimeorformanypurposes.Sometimes,apidgindiesoutofitsownaccord.Whenapidgindevelopsbeyonditsroleasatradelanguageandbecomesthefirstlanguageofasocialcommunity,itbecomesaCreole.Creolehaslargenumbersofnativespeakersandisnotrestrictedatallintheiruse.OnceaCreoleisinexistence,itmaycontinuealmostwithoutchange;itmayevolvefurtherintoanormallanguageorgraduallymergewithitsbaselanguagethroughdecreolization.