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copyconstruction和两次赋值。
One of the three large classes of substances in foods and living cells, lipids contain more than twice as much energy (calories) per unit of weight as the other two (proteins and carbohydrates).
是血液和生物细胞内三大类物质之一，以单位重量所包含的能量（卡路里）计，类脂化合物是其它两种（蛋白质和碳水化合物）的两倍还要多。
Measures humidity, temperature, and barometric pressure in two accuracy classes. The PTU300 series features a large numerical and graphical display. Optional data logging and (w) LAN interface.
该产品可以测量温度、湿度和大气压力，并有两个精度等级可选，此外，PTU300系列带有大屏幕数字显示器。还有可供选择的数据采集和(W)LAN界面。
Measures humidity, temperature, and barometric pressure in two accuracy classes. The PTU300 series features a large numerical and graphical display. Optional data logging and (w) LAN interface.
该产品可以测量温度、湿度和大气压力，并有两个精度等级可选，此外，PTU300系列带有大屏幕数字显示器。还有可供选择的数据采集和(W)LAN界面。
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