Whichmeans“定期存款”?

10."extraordinary,extra-official,extracurricular,extra-professional,extra-solar"andsomeotherwordscontainthesameaffix“extra”whichmeans____________.

Euthanasiaistheactorpracticeofkillingorpermittingthedeathofhopelesslysickorinjuredindividuals(suchaspersonsordomesticanimals)inarelativelypainlesswayforreasonsofmercy.ThewordcomesfromtheGreekeuthanatos,whichmeans'easydeath.'InEnglish,euthanasiahasbeenusedinexactlythissensesincetheearlyseventeenthcentury,whenFrancisBacondescribedthephenomenonas'afterthefashionandsemblanceofakindly&pleasantsleepe.'Nowadays,thewordusuallyreferstothemeansofattainingsuchadeath."