确实，Cheng预计银河中心激震前沿的能量将近是超新星爆发产生的能量的一百倍。

Indeed, Cheng expects that the energy of the shock front at the galactic centre is nearly 100 times greater than that created by a supernova explosion.

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这个蓝色的“子弹”每小时飞行500万公里(300万英里)，恰好能赶上激震前沿，此时冲击波因为星际物质的阻挡已经减速。

This interstellar "bullet," traveling over three million miles per hour (5 million km), is just catching up with the shock front, which has been slowed by plowing into interstellar material.

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