adj.共线的；（在）同（一条）线（上）的；直排的

The three points A, B, and C are collinear if they lie on the same straight line.
如果点A、B和C位于同一条直线上，则它们是共线的。
In geometry, being collinear is a fundamental property of points on a line segment.
在几何学中，处于同一直线上的性质是线段上点的一个基本属性。
The vertices of this triangle are not collinear; otherwise, it would be a degenerate triangle.
这个三角形的顶点并不在同一条直线上；否则它将是一个退化的三角形。
When the forces acting on an object are collinear, their resultants can be determined by simple addition.
当作用在一个物体上的力是共线的时候，其合力可以通过简单的加法来确定。
If two lines are parallel, then no point on one line will be collinear with any point on the other line.
如果两条直线平行，则任一条直线上的点都不会与另一条直线上的点共线。
The directors of these three companies may be considered collinear due to their shared interests and investments.
由于这三家公司的董事们具有共同的利益和投资，可以认为他们是共线的（在这里表示有密切关系的意思）。
The x-coordinates of the points on this graph are all collinear because they form a vertical line.
这张图中的所有点的x坐标都是共线的，因为它们形成了一条垂直线。
For the perspective drawing, ensure that the parallel lines in reality remain collinear when projected onto the canvas.
对于透视画作来说，请确保现实中相互平行的线条在投射到画布上时仍然保持共线。
The pupils in a classroom might appear collinear from a distance but would reveal their individual positions upon closer inspection.
从远处看，教室里的学生可能看起来是在一条直线上，但近距离观察会发现他们各有各的位置。
In photography, the principle of collinearity ensures that the image formed on the film corresponds to the real-world scene's alignment.
在摄影中，共线性原理保证了胶片上形成的图像与其对应的真实场景中的对齐关系相一致。