Individuals who are already in the U.S. and remain in legal status are encouraged to apply at non-border posts in conjunction with foreign travel for business or pleasure. Those who plan to visit Canada, Mexico or, in the cases of students and exchange visitors, adjacent islands, may re-enter the U.S. within thirty days on expired visas as long as they possess a valid I-94 form unless they are excluded from automatic revalidation, as noted below.
这里的"may re-enter the U.S. within thirty days on expired visas as long as they possess a valid I-94 form"怎么解释? 是否意味着可以让你进, 也可以不让你进? 谁有不成功的例子吗?
这里的"may re-enter the U.S. within thirty days on expired visas as long as they possess a valid I-94 form"怎么解释? 是否意味着可以让你进, 也可以不让你进? 谁有不成功的例子吗?