在日常实用中，标准物也许是码尺或米尺。
For everyday purpose, that standard object could be a yardstick or meter stick.
纳米级尺度实物标准是纳米尺寸传递体系中的关键环节，也是评价和校正压电驱动等微扫描微定位装置的重要工具。
Nanometer scale step standards are the keys for dimension transfer, and they are the important tools to evaluate and calibrate micro actuator and micro position devices such as piezoelectric scanner.
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