footrope

详细解释:n. 帆底边索, 踏脚索

详细解释：

foot.rope

n.Nautical （名词）【航海】
A rope attached to the lower border of a sail.
脚缆：系在船的较低的沿上的绳子
A rope, rigged beneath a yard, for sailors to stand on during the reefing or furling of sail.
帆的下缘索：装在桁下的绳子，水手们在收帆或卷帆时踩在上面