lean-to

lean-to
n small building or shed with its roof resting against the side of a larger building, wall or fence 披屋; 单坡棚
    They keep hens in a lean-to at the end of the garden. 他们在园子尽头处的单坡棚里养母鸡.
    [attrib 作定语]
a lean-to greenhouse 单斜面温室.

牛津英汉双解词典