直肠壁薄而没有浆膜复盖。
The rectal wall is thin and has no serosal covering.
youdao
直肠壁薄而没有浆膜覆盖。
太空无壁不可幄，颠风莫动花肌薄。
No wall space is not the tent, Britain took the wind moving mo thin muscle.
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