That is, the bamboo joint that appears every fixed distance on the stem of the bamboo. In addition to bamboo, general woody plants also have special protruding nodes at the branch branches or where the branches meet, so there are so-called "twigs". The word "minor" was later extended to refer to the back end and subtle meaning relative to the trunk, and thus derived a metaphor for some less important things, called "minor details".
Here, nodes are considered to be the telemarketing list junctions of branches at the rear end of the plant. As mentioned above, "knot" refers to the connection between branches and trunks. On the other hand, "eye" refers to the texture of branches and trunks forming unnatural shapes, and the textures are intertwined. The two words "program" together have changed their meanings in history. If today, for reasons such as logging or painting, you catch a show on the branches of a tree, you can roughly grasp the basic shape and texture trend of the tree.
Therefore, the word "program" can refer to the main type of a thing. The main point of the state, and the evolution into "outline, project" and so on can help people to grasp the key points of abstract things. "Book of Rites. "Xue Ji": "A good questioner is like attacking a hard wood, first the easy one, then the program, and how long it is, and explain it to each other." Here, the program refers to the places that must be avoided first when logging.