a point equidistant from the ends of a line or the extremities of a figure
同义词：center, centre
midpoint例句
A stitch made by inserting the needle at the midpoint of a preceding stitch so that the stitches overlap by half lengths.
回针缝在先前缝的一针中间加缝的一针，以便使针脚的交错重叠为原来长度的一半
midpoint详细解释
mid.point n.（名词）Mathematics The point of a line segment or curvilinear arc that divides it into two parts of the same length.【数学】 中点：一条线段或一段弧上的一点，该点将此线段或弧平分为等长的两部分A position midway between two extremes.一半：两端中间的位置
