There are just two new American reactors under construction, neither with full regulatory approval (a third, approved under an earlier system and then put on ice, is also under way).

目前美国正在建设的新反应堆仅有两座，且两者都未完全获得监管部门的批准(第三座新反应堆曾在较早的体系下获得批准，但其后计划被拖延，如今也在建设之中)。

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Over the past two months, a huge section of old homes just north of Gulou was bulldozed to make way for the construction of a nearby subway station.

过去的两个多月里，鼓楼南边的一大片老房屋已经被推土机清除，为修建地铁站让路。

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Now, for classes that store large amounts of data, this method may not be the most efficient way to swap data, because swap involves one copy construction and two assignments.

现在，对于存储大量数据的类，此方法可能不是交换数据的最有效方法，因为swap涉及到一个copy construction和两次赋值。

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