relative control efficacy的用法和樣例：
例句
- Field efficacy trials indicated relativity good control of banana sigatoka leaf spot disease.
田間藥效試驗結果表明，對香蕉葉斑病有較好的防效。 - The mixture of a moderate dose of triazophos and other pesticides improved-pests control effects and guaranteed the safety of crab.
適量施用三唑磷並與其它藥劑混配，達到既能使河蟹安全生長又對水稻害蟲有較好防效的目的。
