在移动标准上，美国最大的移动运营商verizon公司，正在领导实施下一代领先世界的无线技术——lte。
As for standards, Verizon, America's biggest mobile operator, is leading the world in implementing the next wireless technology, called LTE.
数十年以来，美国一直在拥有大学教育的公民比例方面领先世界，但在近年这方面已经被其他国家超过。
For decades, the U.S. led the world in the proportion of citizens with college degrees, but in recent years it has been surpassed by other countries.
数十年以来，美国一直在拥有大学教育的公民比例方面领先世界，但在近年这方面已经被其他国家超过。
For decades, the U. s. led the world in the proportion of citizens with college degrees, but in recent years it has been surpassed by other countries.
马修斯指出，美国和巴西之所以在生物燃料的利用方面领先世界，主要是因为它们拥有可任其支配的辽阔耕地。
Matthews notes that the us and Brazil are world leaders in biofuel usage because of the formidable acreage at their disposal.
马修斯指出，美国和巴西之所以在生物燃料的利用方面领先世界，主要是因为它们拥有可任其支配的辽阔耕地。
Matthews notes that the us and Brazil are world leaders in biofuel usage because of the formidable acreage at their disposal.
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