Task: Translation
Input (Chinese): 他们还说，雷达两次发现了一个以接近2,000英里每小时的速度飞行的物体，而在其他时刻显示的则是一个慢速移动的物体。
Output (English): Twice, they say, radar picked up an object travelling at nearly 2,000 mph, and at other times it showed a slow moving object.