So those are the two main forms of measurement.

那么这就是实施测量的两种主要形式。

She oversaw the development of the country's universal time system and its use of low-frequency radio waves as a form of measurement, which laid the groundwork for the space programme.

她挑起了建立中国世界时系统的重担，及其作为测量形式的低频无线电波的使用，这为空间方案奠定了基础。