calcite in grain

例句：

1. 1. The farmer carefully inspected thegrain for any signs of calcite infestation.
   农民仔细检查了谷物，以寻找任何方解石的侵害迹象。
2. 2.The grain was harvested from a fieldthat had been treated with calcite toimprove its quality.
   这种谷物是从经过方解石处理以提高品质的田地里收获的。
3. 3. The farmer used calcite in hisfertilizer to help the grain growbetter.
   这位农民在他的肥料中使用了方解石，以帮助谷物生长得更好。