subgrade英英字典_subgrade剑桥英语解释_subgrade柯林斯英文解释

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subgrade英英字典_subgrade剑桥英语解释_subgrade柯林斯英文解释_按摩法牛津词典

subgrade

柯林斯词典

subgrade /ˈsʌbˌɡreɪd/