美国人来自美国（洲）。

Americans come from America.

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“丑陋的美国人”这一词语来自去国外旅行的美国人认为所有人都应该一样的态度。

The term "Ugly American" comes from people travelling with the attitude that people are, or should be, the same everywhere.

《柯林斯英汉双解大词典》

美国是个移民之地，所以美国人吃的食物来自许多不同的国家，当人们移居美国，他们也将自己的烹调带了进来。

The United States is a land of immigrants.So Americans eat food from many different countries.When people move to America,they bring their cooking styles with them.

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He has this whole group of people out somewhere on the American frontier and they're a kind of a cult.

他描写了来自于美国边界某处的一群人,他们是一群狂热分子

耶鲁公开课 - 美国内战与重建课程节选

Yeah, well my best friend is French. But most of my friends are from America.

是，嗯，我最好的朋友是法国人。但是我的大多数朋友来自美国。

有趣的留学生活 - SpeakingMax英语口语达人

So, if you were to lose half your brain, the other half can actually do a lot but some things are more prevalent and more powerful in one part of the brain than the other And I want to show you a brief film clip from "Scientific American" that illustrates the differences between the hemispheres, but before doing that,I want to provide some introductory facts.

如果你失去了半个大脑,另外一半其实也可以完成很多功能,但是某些功能是存在单侧化优势的,我给你们播放一段短片,来自于《科学美国人》,它解释了大脑两半球的功能差异,但在此之前,我想先做一些介绍

耶鲁公开课 - 心理学导论课程节选