美国永久居留权。持有者可在美国不受限制地居住和工作，并有资格申请公民身份。获取途径包括家庭移民、职业移民（EB-1至EB-5）和抽签（DV Lottery）。有效期10年，需续期，但永久居留权本身不会过期。
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