1952年后，格林威治的民用时，已称为。

Since 1952, the civil time at Greenwich has been called Universal time.

youdao

官方民用时间是由NIST - F 1铯原子钟记录，其准确度在每1亿年一秒的范围内。

Official civilian time is kept by the cesium NIST-F1 fountain clock, accurate to within one second every 100 million years.

youdao

官方民用时间是由NIST - F 1铯原子钟记录，其准确度在每1亿年一秒的范围内。

Official civilian time is kept by the cesium NIST-F1 fountain clock, accurate to within one second every 100 million years.

youdao