US department of justice immigration and naturalizaiton service美國移民局Permanent Resident Card綠卡The person identified by this card is authorized to work and reside in the US這張卡擁有人可以在美國居住和工作Void if altered， may be revoked by ins改變無效，可被移民官收回我相信你要問的是第三句吧，那是說“這張卡擁有人可以在美國居住和工作”