单词 earth-board 释义 earth-board[f. earth n.1 (or perh. n.2) + board.]The mould-board of a plough.1649W. Blithe Eng. Improv. Impr. (1653) 190 The Shield-board, some call Breast-board, or Earth-board, or Furrow-board.1765Univ. Mag. XXXVII. 33/2 The plat,...