backstay

名词 backstay:

1. a stay that supports the back of something

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