... 停机时间比 downtime ratio 向下闭合 downward closed 向下相容性 downward compatibility ...
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downward closed detail 向下闭合
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Since the 1980s, the area has undergone rapid deindustrialization as the steel mills closed and set in motion a downward spiral of economic decline resulting in a series of social problems .
从1980年代起，区域己经经受快捷解除工业化，当钢厂关闭和把运动嵌入一经济衰退的向下螺线结果是一系列的社会的问题时。
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