A gap or rift, especially in or as if in a solid structure such as a dike or fortification.

豁口或缺口，尤指位于或好象位于壕沟或要塞等坚固结构中的。

youdao

A gap or rift, especially in or as if in a solid structure such as a dike or fortification.

豁口或缺口，尤指位于或好象位于壕沟或要塞等坚固结构中的。

youdao