sunk a.凹陷的sink的过去式和过...be sunk in deep thoughts 陷入沉思...sunk suture 埋藏缝术...sunk or burnt 沉没或焚毁...sunk key 沉头键...sunk fence 矮墙...sunk head rivet 沉头铆钉...counter sunk 钉孔,钻孔(牙)...
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