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。

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.

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大使先生下楼来到了非移民签证处，深入地了解了签证流程。 首先，他将一位申请人的信息输入数据库。

Moving downstairs to the Non-Immigrant Visa (NIV) Unit, the Ambassador learned in depth about the visa process, beginning with the entering of each applicant's information into the database.

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虽然本人的口头陈述对获得签证有一定帮助，但是根据美国法律规定，仅凭口头保证不能证明您符合非移民签证的条件。

Statements indicating that the applicant intends to return to China are helpful, but under the requirements of U. S. law the statement alone is not adequate to show that they qualify for a visa.

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Just almost all the islands in that sea are inhabited by Greeks, mostly by the Greeks that came in that first wave of immigrants earlier on, not colonized during the eighth century and afterwards.

那片海域的诸岛上居住的几乎都是希腊人,他们大多都是早期的,第一批移民,而非八世纪以后的殖民者

耶鲁公开课 - 古希腊历史简介课程节选