图片靠近中心部分的白色光源为一种密度大，急速旋转的中子星，或是脉冲星--都是核心坍缩的超新星爆炸的残留物。

The white source near the center of the image is a dense, rapidly rotating neutron star, or pulsar, all that remains of a core-collapse supernova explosion.

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一个工程师将武装机器人身上的摄像头旋转至房顶上的狙击手，机关枪开始旋转，瞄准，然后急速射击了两枪。

One swivels the video camera on the armed robot until it spots a sniper on a rooftop. The machine gun pirouettes, points and fires in two rapid bursts.

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失速前飞机经历了轻微的“旋转”，接着就以每分10912英尺的速度(3300米)急速下落。

The aircraft experienced some "rolling" before stalling and then descending rapidly at 10,912 feet (3,300 meters) per minute.

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