單傾斜面的小屋單傾斜面的
Lean-to \Lean"-to`\, a. (Arch.) Having only one slope or pitch; -- said of a roof. -- n. A shed or slight building placed against the wall of a larger structure and having a single-pitched roof; -- called also {penthouse}, and {to-fall}.
lean-to n : rough shelter whose roof has only one slope