本線.
the main line
the principal axis
流線.
the line of flow
the starting line
the main line―the trunk line
the main vein
大静脈.
the main vein
the main post
本通り.
the main drag
the main drag
The outpost line.
the main course
the main course
the main-top
the main point
the starting post
the top
the chief points―the main points
the nominative case
the major premise
the positive degree