在北非的许多国家，如苏丹和利比亚，签证很难获得，而且这里给背包者的供应也很少。
In many countries in the north, such as Sudan and Libya, visas are hard to obtain, and there is little provision for backpackers.
我猜测，通过获得新加坡的护照，她可以去很多国家而无需申请签证。
I have my guess that by obtaining S'pore passport, she can travel to many countries without having to apply for visas.
到达目的地前，很多国家会要求你先办好有效的签证。
Many countries require you to have a valid visa before arriving.
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