详细解释:n. 回式针迹
vt. 用回式针迹缝
vi. 用回式针迹缝
英语解释：
名词 backstitch:
overlapping stitch made by starting next stitch at middle of preceding one动词 backstitch:
do backstitches详细解释：
back.stitch
n.（名词）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
【引伸】
back.stitch.
v.（动词）