For a gravitational wave to be unambiguously identified, it must be detected by more than one instrument. 鉴于重力波显而易见的研究地位，必须投入更多的仪器来进行研究。
If a wave passes between you and a pulsar, it will alternately stretch and compress the distance between pulses, so the blinking will appear to slow down and speed up. 脉冲星这种恒星会发出像原子钟般规律的闪光，要是重力波从你和脉冲星之间穿过，它便会交互拉长和压缩脉冲及脉冲之间的空间，闪光于是跟著减速和加速。
That is why gravitational waves are so difficult to detect! 这就是为什么引力波的探测如此困难的原因。
These spacetime distortions travel as gravitational waves. 这些时空的改变以引力波的形式传递。
