短语词组短語ploughshare bone 尾綜骨trapezoidal ploughshare 梯形犁鏵Ploughshare Tortoise 安哥洛卡象龜;犁頭龜trench ploughshare 開溝犁犁鏵underpoint suction in throatof ploughshare 垂直第二犁鏵 返回 ploughshare