Physiographically, the United States may be separated into three major divisions.

从地形上美国可以分成3个主要地区。

《新英汉大辞典》

Wild chimpanzees cannot be imported into the United States, but those that are born in captivity here can still be purchased as pets and used in biomedical research and entertainment.

虽然野生的黑猩猩不可能进口到美国，但是那些在圈养中出生的黑猩猩仍然可以被当做宠物，用于生物医学研究或娱乐而买卖。

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It is not surprising, then, that both Downey and Fecteau were fearful, particularly in the early years, that they would be turned into ideological zombies or traitors to the United States.

因此唐尼和费克图在被俘最初的几年里对此感到害怕，也就并不奇怪了。他们不想被变成满脑子某种主义的怪物，或成为美国的叛徒。

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Once the shuttle is retired this year, the only way for the United States to get astronauts into orbit will be on Russian Soyuz rockets.

VOA: special.2010.04.28

Attorney General Eric Holder told lawmakers Thursday that terrorists will not be released into the United States and the safety of Americans will not be put at risk.

VOA: standard.2009.05.09

Getting into the United States should not be like getting into Harvard.

CNN: Commentary: Immigration plan unites far right and far left

The food will not be allowed into the United States until the importer can prove it is free from harmful contaminants, Acheson said.

CNN: FDA blocking import of 5 species of fish from China

Two of its central historical planks were bolted into the Good Friday agreement: the principle that Ulster cannot be forced into a united Ireland without the consent of the majority of its people, and the renunciation of Ireland's constitutional claim to the north.

ECONOMIST: In Gerry we trust?