他们还选择了超过1200个不活跃的星系，它们的距离和亮级都相同，这样可以保证图像的质量相同。
They then chose more than 1,200 inactive galaxies at the same distance and brightness levels to ensure all images were of the same quality.
科学家们利用哈勃望远镜计算出该恒星行进的方向和离银河系中心的距离，连同他的质量、年龄和速度一起计算。
The scientists used the Hubble to figure out the direction of the star's travels and the distance from the galactic center, along with the star's mass, age and speed.
在开始一周的恢复后，她逐渐增加了训练的数量和质量，坚持长距离跑步。
After an initial week of recovery, she gradually added quality and volume back into her training, and continued long runs.
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