Many backward production facilities that should have been closed down are still in operation.

不少应该淘汰的落后生产能力还没有退出市场。

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Example: Adding operation transfer is a backward compatible change.

示例：添加操作transfer是向后兼容变更。

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Example: Adding operation transfer is a backward compatible change.

示例：添加操作transfer是向后兼容变更。

youdao