这些原子钟的时间是协调世界时(utc)的基础，在1972年协调世界时开始成为全球商务活动的依据。

These clocks are the basis for Coordinated Universal Time (UTC), which in 1972 became the basis for global commerce.

youdao

这些原子钟的时间是协调世界时(utc)的基础，在1972年协调世界时开始成为全球商务活动的依据。

These clocks are the basis for Coordinated Universal Time (UTC), which in 1972 became the basis for global commerce.

youdao