In Japanese, nouns do not have a plural form. This makes understanding the terminology more difficult.
@indy’s explanation of the jargon was very helpful. Here is the Japanese translation based on this commentary.
I finally understood.
@rhyolight’s illustrations in HTMSchool Episode 11 were also very helpful.
Using the video as a reference, I also illustrated it.
Thank you for publishing a very good tutorial.
Translated with www.DeepL.com/Translator (free version)