trophic 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。 - Ecologists assign every organism in an ecosystem to a feeding level,or trophic level,depending on its source of food or nutrients.
生態(tài)學(xué)家分配在生態(tài)系的每個(gè)有機體到一個(gè)哺養的水平或者食性層次，根據它的食物或營(yíng)養素的來(lái)源。
