1.Nonimmigrants enter the United States for a temporary period of time, and once in the United States, are restricted to the activity or reason for which their nonimmigrant visa was issued.
非移民工人短暂的逗留美国，在美国只能被限制从事他们在签证上说明的原因上的活动。
2.Nonimmigrants enter the United States for a temporary period of time, and once in the United States, are restricted to the activity or reason for which their nonimmigrant visa was issued.
