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1. 盒子：gainable /可得到的/ | gaine /盒子/ | gained /得到/增进/获得/获利/
2. 套,罩,箱,壳：增益-频率特性 gain-frequency characteristic | 套,罩,箱,壳 gaine | 线担槽(木电杆收入,利益(复数) gaining