incision
n[C, U]
(act or instance of) cutting, esp by a surgeon into the flesh for an operation 切, 切开, 切割, 切口(尤指外科手术)
make a deep incision in the thigh 在大腿上深切一刀.
If you are lucky enough to get a sleeper, you spend half the night staring at the small blue light in the ceiling, or fumbling to find you ticket for inspection.