例句與造句

1. Mills used to use heavy stones to grind down the wheat into flour ; now they use more modern machinery
   磨房過去使用笨重的石磨把麥磨成面粉；現(xiàn)在它們使用的是比較現(xiàn)代的機械。
2. It's difficult to find grind down the wheat into flour in a sentence. 用grind down the wheat into flour造句挺難的