Specimen可与sample换用，但常指人或物中选出的有代表性部分，或指供科研、化验或检验用的标本。 They unloaded it & took it again in at once, & an exchange electronically was carried out at that minute in a sign-up to return it & rebuy it for get the following day. All of this I in less than 5 minutes. When I came to receive it https://www.diigo.com/user/luxurynewhome