大家在查：哥斯登宫津 coperation 1000t Shezu s_JSMinUtils condoled 哥尔斯坦维肯 4：23分

NIST-F1

NIST-F1

NIST-F1

NIST-F1

1

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

官方民用时间是由 NIST-F1 铯原子钟记录，其准确度在每 1亿年一秒的范围内。

热词推荐

大家在看