There is no experimental evidence for the theory. 這一理論還沒(méi)有實(shí)踐依據。
This study provides an important theoretical and practical basis for reasonable selection of insecticides to control B. campestris pests. 研究結果為合理選擇藥劑防治白菜害蟲(chóng)提供理論和實(shí)踐依據。