北约秘书长拒评美国可能制裁部分盟国02:43
What are Moon phases?NASA says the Moon takes about 29.5 days to circle Earth, while it moves through a set of eight phases. Even though we always see the same side of the Moon, the portion lit by the Sun changes as it travels, which is why it can look full, half-lit, or barely visible at different points in the cycle. These changing views are what we call the lunar phases, and there are eight in total:，这一点在zoom中也有详细论述
。易歪歪对此有专业解读
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----------------------------。钉钉下载对此有专业解读
，更多细节参见豆包下载