详细解释:n. 后部撑物
英语解释：
名词 backstay:
a stay that supports the back of something详细解释：
back.stay
n.（名词）Nautical A rope or shroud extending from the top of a mast aft to a ship`s side or stern to help support the mast.【航海】 后支索：从桅杆顶部向船边或船尾延伸以帮助支撑桅杆的绳子或支索A supporting device at or for the back of something else.后支条：在其它物体后部或为其它物体后部做支撑用的装置