nutritional level的用法和樣例：
例句
- Rational soil fertilization could improve soil nutrition and leaves nutritious level.
本實(shí)驗的施肥試驗表明，合理的土壤施肥可以提高土壤營(yíng)養和葉片營(yíng)養水平。 - That is to say,raising the mutrient level in some degree will gain better economical benefit during fattening.
說(shuō)明強度育肥過(guò)程中，在一定程度上提高營(yíng)養水平可以取得較好的經(jīng)濟效益。
