The central pair zoom around each other at a fast clip, about 300 times the speed of sound on Earth.

中心的这一对黑洞运动速度非常快，相当于声音在地球上传播速度的300倍。

The jump was bigger than had been expected by most economists and adds to pressure on the Federal Reserve to increase interest rates at a faster clip.

这一增幅超出了多数经济学家的预期，增加了美联储以更快速度加息的压力。

But if Texas can continue growing its population base at a faster clip than California as it has been for the past 23 years now, for how much longer will California remain the top US state economy?

但是，如果德克萨斯州能够像过去 23 年那样继续以比加利福尼亚州更快的速度增长人口基数，那么加利福尼亚州作为美国第一大州的经济地位还能保持多久？