其他有关文件、证件。
证件过期或文件丢失，可能延误你的行程，加急申请则会带来额外的费用。
Expired or missing paperwork can delay your trip and add costly charges for expedited applications.
对于那些没有单一证明文件的旅客，则必须出示身份证及公民证件。
Those travelers who do not have one of the single-document options must present both an identification document and a citizenship document.
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