有非常严格的代码去除，或缺口钻进墙壁和地板承载桁架。
There are very strict codes on removing, drilling or notching load bearing walls and floor joist.
这意味着，在测试覆盖中，不应当有任何不必要的覆盖或缺口。
This means that there should not be any unnecessary overlap or gaps in the test coverage.
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。
A gap or rift, especially in or as if in a solid structure such as a dike or fortification.
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