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微笑藤弥
“骨干” -Backbone选拔和培养了一批中层骨干，完成了骨干的新老交替 Selected and has raised one batch of intermediate backbone, has completed the new replacing the old of backbone
韩建忠001
core persons
xuexue1535
正确的答案肯定是 backbone
牛牛1223
backbone; diaphysismainstay; hardcore
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