A developer might put a collection of re-formatted datasets online, but without an explicit license or legal notice - meaning others won't know whether they are allowed to reuse them or not.

开发人员可能投入了大量的重新格式化数据集网上收集，但没有一个明确的许可或法律通知-这意味着其他人将不知道他们是否允许重用它们。