中ちゅう間かん線せん

noun

dividing line; intermediate line

A line that separates or marks a boundary between two areas, or a line positioned between two others. Used in contexts like sports, geography, or diagrams.

• コートの真まん中なかに中ちゅう間かん線せんが引ひかれている。

  A center line is drawn in the middle of the court.

• 地ち図ず上じょうに中ちゅう間かん線せんを引ひいて領りょう域いきを分わけた。

  We drew a dividing line on the map to separate the areas.

noun

intermediate rays

Rare technical term, possibly in optics or physics, referring to rays that are neither the shortest nor the longest. Limited to specialized contexts.

• この光こう学がく系けいでは中ちゅう間かん線せんの屈くっ折せつが問もん題だいになる。

  In this optical system, the refraction of intermediate rays becomes an issue.