USML(US Microgravity Laboratory)美国微重力实验室
3)"American Reality"美国现实
1.Travel and "American Reality" in American Literature;美国文学中的旅行与美国现实
4)American millitary forces美国军力
5)American solid celery美国实心芹
1.Having been grown for several years, this new variety has shown its merits inherited from both its parents, the American solid celery and Shanghai yellow- core celery.经多年种植表明,该品种结合了父本美国实心芹和母本上海黄心芹的许多优点,小区试验的产量比母本黄心芹高出 30％以上（“玉芹”为每公顷5。
6)practice in the USA美国的实践
延伸阅读
美国国家标准(见美国标准体系)美国国家标准(见美国标准体系)national standards of USA: see standards system of America Meiguo guOJia bicozhun美国国家标准(national见美国标准体系。of USA)
