laboratory standard of frequency

例句：

1. 1. The laboratory standard of frequency is crucialfor the accuracy of scientific measurements.
   实验室频率标准对于科学测量的准确性至关重要。
2. 2. The newdevice uses a laboratory standard of frequency toensure consistent performance.
   新设备使用实验室频率标准来确保一致的性能。
3. 3. Theresearch team developed a laboratorystandard of frequency that could beused in various applications.
   研究团队开发了一种实验室频率标准，可以应用于各种应用中。