At this stage, the star becomes a large red giant.
在此阶段，这个恒星变成了巨大的红巨星。
The star is in its twilight years, having become a red giant.
这颗恒星处于衰退期，已经变成了一个红巨星。
This star is a red giant with a visual magnitude of 17.
这颗恒星是一颗红巨人与一个视觉幅度17。
This star is a red giant with a visual magnitude of 17.
这颗恒星是一颗红巨人与一个视觉幅度17。
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