◎◎◎ perigee ⪢⪢
Now about half a month later, the moon has orbited halfway around its path and it gets to its closest
point to the earth. We refer to this as perigee.
→ apogee, perihelion #bookmark
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○○○ subscribe ⪢⪢
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point during the video give me a thumbs up if this video is helping you learn English. #bookmark
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◌◌◌ Line
From here, we can construct a one- dimensional object by stringing an infinite number of
points along a particular dimension. This object is called a line.
http://qindex.info/i.php?x=5177