短语词组短语Coving letters 求职附信coving radius 覆盖半径coving spaces 覆叠空间back coving baffle 后罩板coving defend method 覆盖防护方法metallurgic coving flux 冶金用集渣覆盖剂coving of the complete graph 图覆盖remittances coving trust fund losses 拨补信托资金亏损 返回 coving