If the smoke were in the United States, it would extend approximately from San Francisco to Chicago.

如果换作是在美国的话，浓烟可能要从旧金山一只延伸到芝加哥。

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The Geysers, located in the Mayacamas Mountains north of San Francisco, California, is the United States' first geothermal power plant and turned 50 years old this year.

间歇泉电站，位于加利福尼亚洲旧金山北部的马亚·卡马斯山脉，是美国第一家地热电站，到今年已有50年历史了。

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Although it was stronger than any earthquake in the continental United States since the Great San Francisco earthquake of 1906 (magnitude 7.8), it was modest by Indonesian standards.

虽然除了1906年旧金山7.8级大地震外，美国本土还没有发生过比这更强烈的地震；但在印度尼西亚，这只能算是中等强度的了。

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They do not want people in Frisco oops,make that San Francisco to forget the first and only emperor of the United States.

VOA: special.2009.12.14

How would you compare San Francisco to other parts of the United States?

与美国其它地方比，旧金山怎么样？

旧金山最棒 - SpeakingMax英语口语达人

He sent an announcement to the newspapers of San Francisco saying he was Emperor Norton the First of the United States and the Protector of Mexico.

VOA: special.2009.12.14

All it took was one playoff game against the Green Bay Packers for quarterback Colin Kaepernick of the San Francisco 49ers to become a household name across the United States.

FORBES: The Business Of Colin Kaepernick

Beijing insists it will carry the relay through to the end and says it's working with American officials to ensure the torch makes it safely through San Francisco its sole planned stop in the United States on Wednesday.

NPR: Olympic Torch Relay Chaotic in San Francisco

As the City has enjoyed a renaissance of sorts, as many other urban areas in the United States like Atlanta, Boston, San Francisco and Chicago have done, real estate values have vacillated with peaks in hipster neighborhoods and dips in less favorable areas.

FORBES: Philadelphia Battle Over Property Tax Assessments Raises Questions About Funding Public Schools