例句與造句

1. Sanitation, clean stock, and soil sterilization or pasteurization provide three legs of a good preventive program .
   清潔衛(wèi)生、砧木消毒和土壤消毒這是良好的預(yù)防計(jì)劃的三條腿。
2. It's difficult to find soil sterilization in a sentence. 用soil sterilization造句挺難的