N-COUNT A visa is an official document, or a stamp put in your passport, that allows you to enter or leave a particular country. 签证
His visitor's visa expired.
他的访问签证过期了。
...an exit visa.
…一张出境签证。
To get our Colombian visas we bused back to Medellin.
为了获得哥伦比亚签证，我们又乘公共汽车回到麦德林。
Up to forty percent of the students had overstayed their visas.
多达百分之四十的学生逾签证期限滞留。
They said they would press for reciprocity with Greece in the issuing of visas.
他们说，他们将会对希腊施压，以达成签证发放的互惠。
But he also says many visas are delayed because foreign students do not bring all their paperwork when requesting their travel documents.
VOA: special.2009.06.11
But because of doctor shortages or other needs, some have been able to get visas without the required two-year stay in their home country.
VOA: special.2009.06.02
In addition,thousands of the visas are awarded to other groups, such as university researchers.
VOA: special.2009.07.02
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