Although the stars were just half a million years old-still in their infancy in stellar time scales-most had already lost their planet-forming disks of gas and dust.

虽然这些恒星只有五十万年——按照恒星的时间尺度计算，它们还处于婴儿期——但是大都已经失去了其形成行星的由气体与尘埃组成的圆盘。

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Although the stars were just half a million years old-still in their infancy in stellar time scales-most had already lost their planet-forming disks of gas and dust.

虽然这些恒星只有五十万年——按照恒星的时间尺度计算，它们还处于婴儿期——但是大都已经失去了其形成行星的由气体与尘埃组成的圆盘。

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