American automobiles must meet a federally mandated fuel-efficiency standard of 54.5 miles per gallon by 2025 .

到2025年，美国汽车必须符合联邦法律规定的每加仑燃油行驶54.5英里的燃油经济性标准。

Sales are made only to federally licensed firearms dealers and distributors in accordance with applicable laws and regulations .

只有获得联邦许可的枪械经销商遵照适用的法律法规方可销售枪支或弹药。

The firms could then buy and sell permits under federally mandated emissions caps .

公司可以在联邦政府授权的排放量上限内购买和销售配额。

Today federally funded scientific research is monitored by the office of research integrity .

如今，由美国联邦资助的科学研究情况是由科研诚信办公室来监督。

Islamists have ousted the state in the federally administered tribal areas and parts of the north west frontier province .

伊斯兰武装分子已经占领了巴基斯坦官方管理联盟的部落地区以及部分西北边境省份。