Study on the Influence of Artificial Defoliation on the Yield of Common Cabbage and the Action Thresholds for Main Leaf-Mass Consuming Insect是什么意思_Study on the Influence of Artificial Defoliation on the Yield of Common Cabbage and the Action Thresholds for Main Leaf-Mass Consuming Insect在线翻译_英语_读音_用法_例句