Chinese scientists have found key evidence for the existence of nanohertz gravitational waves.

中国科学家发现了纳赫兹引力波存在的关键证据。

So far, using FAST-like large radio telescopes to conduct long-term timing observation of millisecond pulsars with extreme rotational stability is the only known method for effectively detecting nanohertz gravitational waves.

到目前为止，使用类似FAST的大型射电望远镜，对具有极端旋转稳定性的毫秒脉冲星进行长期定时观测，是唯一已知的有效探测纳赫兹引力波的方法。

So the NANOGrav experiment is sensitive to gravitationally frequencies that are between one and 100 nanohertz and nanohertz is probably not very intuitive to people who are not used to thinking about an atom.

NANOGrav 实验对 1-100 纳赫兹之间的引力波频率非常敏感，而对于不习惯思考原子的人来说，“纳赫兹”可能不是很直观。

They found key evidence for quadrupole correlation signatures compatible with the prediction of nanohertz gravitational waves at a 4.6-sigma statistical confidence level, with a false alarm probability of two in a million.

他们发现了四极杆相关特征的关键证据， 这些特征与4.6西格玛统计置信水平的纳赫兹引力波预测兼容，误报概率为百万分之二。

The detection of nanohertz gravitational waves can be very challenging due to their extremely low frequency, where the corresponding period can be as long as several years and wavelengths up to several light-years.

纳赫兹引力波的探测非常具有挑战性，因为它们的频率极低，相应的周期可能长达几年，波长可达几光年。

The researchers will further focus on nanohertz gravitational waves and open up a new scientific direction of nanohertz gravitational wave astronomy, and continue to maintain the country's leading position in low-frequency radio astronomy in the world, said Chang.

研究人员将进一步聚焦纳赫兹引力波， 开辟纳赫兹引力波天文学新的科学方向，继续保持我国在低频射电天文学领域的国际领先地位。