In Engpsh, the phrase "不是个例" can be translated to "not an exception" or "not an isolated case." It is used to indicate that something is not an isolated occurrence, but rather part of a broader pattern or trend. For example, you could say "这种情况并不是个例，很多人都遇到过类似的问题" to mean "This situation is not an isolated case; many people have encountered similar problems."