topping soybean and defoliant
大豆掐尖和脱叶剂
The Study on Effect of the Defoliant to Content of Abacisic Acid in Cotton Tissue
喷施脱叶剂对棉花组织中脱落酸含量的影响研究
During the Vietnam war, thousands of hectares of forest were destroyed with chemical defoliant.
越战期间，数千公顷的森林被化学落叶剂摧毁了。
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