单词：over-under-thru
over-under-thru (plural over-under-thrus)
a type of obstacle in obstacle course racing composed of multiple walls, where the competitor must climb over a wall, pass under a wall with a hole at the bottom, and pass through a wall with a hole at mid-height
a type of obstacle in obstacle course racing composed of multiple walls, where the competitor must climb over a wall, pass under a wall with a hole at the bottom, and pass through a wall with a hole at mid-height