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As was already mentioned several times, a module should be easily replaceable. Even if there are several other modules dependent on it, having a clear, public API enables us to replace the module by a new implementation. There are also some other considerations, e.g. related to bootstrapping of the module, but the clear API is by far the most important one.
。体育直播是该领域的重要参考
1990年，在《滴水穿石的启示》一文中，习近平同志这样写道：
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